Scientists have designed a tiny robot-fish that is programmed to remove microplastics from seas and oceans by swimming around and adsorbing them on its soft, flexible, self-healing body. From a report: Microplastics are the billions of tiny plastic particles which fragment from the bigger plastic things used every day such as water bottles, car tyres and synthetic T-shirts. They are one of the 21st century's biggest environmental problems because once they are dispersed into the environment through the breakdown of larger plastics they are very hard to get rid of, making their way into drinking water, produce, and food, harming the environment and animal and human health.

"It is of great significance to develop a robot to accurately collect and sample detrimental microplastic pollutants from the aquatic environment," said Yuyan Wang, a researcher at the Polymer Research Institute of Sichuan University and one of the lead authors on the study. Her team's novel invention is described in a research paper in the journal Nano Letters. "To the best of our knowledge, this is the first example of such soft robots." Researchers at Sichuan University have revealed an innovative solution to track down these pollutants when it comes to water contamination: designing a tiny self-propelled robo-fish that can swim around, latch on to free-floating microplastics, and fix itself if it gets cut or damaged while on its expedition.

NASA announced on Tuesday that it's contracting three suppliers to provide concept designs for nuclear fission energy systems designed for use on the moon. TechCrunch reports: The winning bids for this award came from Lockheed Martin, Westinghouse and IX (a joint venture from Intuitive Machines and X-Energy). Each will be working with a few partners to develop their systems, which will be "initial concepts" only for the purposes of satisfying this particular contract, and each will receive roughly $5 million for their work, expected to take around 12 months.

NASA is aptly partnering with the Department of Energy (DOE) on this project, and the specs include a 40-kilowatt power generation capability, capable of generating that for at least a decade. That's about what a full charge on a current entry-level Nissan Leaf contains -- but as a fission generator it would obviously provide that continuously. It may not seem like much, but deployed singularly or in groups to support a lunar base, it could solve a lot of the challenges of the kind of prolonged occupancy of the moon that NASA plans to eventually establish through its Artemis program, which seeks to return humans to our largest natural satellite for ongoing science missions. NASA also notes that the work done for this contract could have other future applications for propulsion systems for long-range spacecraft for deep space explorations.

The Israeli Ministry of Defense plans to begin testing of a Medium Robotic Combat Vehicle (M-RCV) next year. New Atlas reports: Developed by the Ministry of Defense's Directorate of Defense Research and Development (DDR&D), the Tank and APC Directorate, and Israeli security industries, the robotic tank is based on a new robotic platform type BLR-2 made by Israeli firm BL. It features a 30-mm autonomous turret originally developed by the Tank and APC Directorate for the Eitan armored personnel carrier; the Elbit Iron Fist Active Protection System, which is a smaller, mountable version of the Iron Dome anti-projectile defense system; fire control and mission management systems; a robotic autonomous operations kit; and active and passive sensors for situational awareness.

In addition, the robotic vehicle carries a capsuled drone that it can deploy and retrieve for forward reconnaissance missions. It can also carry a variety of heavy loads, as well as an Israeli Aerospace Industries missile launcher and Rafael Advanced Defense Systems Spike missiles. According to Elbit, the robot can operate in all weathers in a largely autonomous mode and can integrate with uncrewed battlefield arrays. Field tests in representative scenarios are scheduled to start in 2023. You can view the M-RCV in action here.

Taiwanese research firm TrendForce said Monday that DRAM pricing for commercial buyers is forecast to drop around three to eight percent across those markets in the third quarter compared to the previous three months. Even prices for DDR5 modules in the PC market could drop as much as five percent from July to September. The Register reports: This could result in DRAM buyers, such as system vendors and distributors, reducing prices for end users if they hope to stimulate demand in markets like PC and smartphones where sales have waned. We suppose they could try to profit on the decreased memory prices, but with many people tightening their budgets, we hope this won't be the case. The culprit for the DRAM price drop is one that we've been hearing a great deal about in the past few months: weaker demand for consumer electronics, including PCs and smartphones, as a result of high inflation and Russia's ongoing invasion of Ukraine, according to TrendForce.

The weaker consumer demand means DRAM inventories are building up at system vendors and distributors, which means they don't need to buy as much in the near future. This, in turn, is why memory prices are dropping, the research firm said. On the PC side, DDR4 memory pricing is expected to drop three to eight percent in the third quarter of 2022 after only seeing a zero to five percent decline in the second quarter. DDR5 pricing, on the other hand, is set to drop by only zero to five percent in Q3 after seeing a three to eight percent plummet in the previous quarter. For certain DRAM products, prices could see a steeper decline of more than eight percent, according to TrendForce, though the firm didn't say which products this would include. TrendForce said PC makers are focused on getting rid of their existing DRAM inventories, and a continuously "sluggish" market means they'll be reticent to buy much more memory.

An anonymous reader quotes a report from the Indian Express: The US should do more to attract overseas chipmakers to build plants on its territory as a matter of national security, former Google chief Eric Schmidt wrote in an opinion piece published Monday. Pointing to China's accelerating investment in chip fabrication technology and capacity, Schmidt urged the US to reduce its dependence on Taiwan and South Korea for the most advanced semiconductors powering everything from smartphones to ballistic missiles and build out its own capabilities. Instead, it should be incentivizing national champions Taiwan Semiconductor Manufacturing Co. and Samsung Electronics Co. to partner with US chip designers and build more on US soil, he said.

International relations scholar Graham Allison, who shares the byline on the Wall Street Journal article with Schmidt, previously warned that the US and China could be on a path to war that neither country wants. The two men set out policy recommendations for improving American competitiveness in the chipmaking race so as to avoid a drastic imbalance between the two superpowers. "If Beijing develops durable advantages across the semiconductor supply chain, it would generate breakthroughs in foundational technologies that the U.S. cannot match," they wrote. "The U.S. can't spend its way out of this predicament."

In addition to President Joe Biden's proposed $52 billion investment plan -- which is still under consideration by US legislators -- the US should lean into its strengths of research and development, manufacturing less-advanced but more widely used slower chips through the likes of Intel Corp. and GlobalFoundries Inc., and redouble its efforts to bring TSMC and Samsung on shore. Both Asian companies are constructing fabs in the US, but Schmidt and Allison's message is that more needs to be done to ensure long-term US prosperity. "America is on the verge of losing the chip competition," they said, urging that "the U.S. government mobilizes a national effort similar to the one that created the technologies that won World War II."

A $14.95 smart lamp from Ikea apparently has enough computing power to run the classic PC game Doom. From a report: A software engineer named Nicola Wrachien removed the smart lamp's computer chip and used it to build a miniaturized Doom gaming system. Over the weekend, he uploaded a video to YouTube, showing his creation in action. The system runs a downsized version of Doom that requires less RAM. The chip from the Ikea lamp has enough processing power to play the game at 35 frames per second over a cheap 160-by-128-pixel display. Wrachien, who is from Hungary, embarked on the project after reading headlines about Doom purportedly running on a pregnancy test. In reality, the pregnancy test was only able to run the game due to an added OLED display and streaming it from a PC.

"Practical nuclear fusion is, famously, always 10 years in the future," reports IEEE Spectrum. "Except that the Pentagon recently gave an award to a tiny startup to launch a fusion power system into space in just five..." Avalanche Energy Designs, based near a Boeing facility in Seattle...is working on modular "micro fusion packs," small enough to hold in your hand yet capable of powering everything from electric cars to spaceships. Last month, the Pentagon's Defense Innovation Unit (DIU) announced it had awarded Avalanche an unspecified sum to develop its Orbitron fusion device to generate either heat or electricity, with the aim of powering a high-efficiency propulsion system aboard a prototype satellite in 2027....

Avalanche's Orbitron... could theoretically fit on a tabletop. It relies on the Ph.D. thesis of Tom McGuire, a student working on inertial electrostatic confinement (IEC) fusion at MIT in 2007... McGuire's IEC work languished until it caught the attention of two engineers working at Blue Origin: Robin Langtry and Brian Riordan. In 2018, they formed Avalanche Energy as a side hustle, eventually leaving Blue Origin in the summer of 2021. In March of this year Avalanche emerged from stealth with $5 million in venture-capital funding and a staff of 10, although Avalanche's official address is still a single-family home in Seattle.

Avalanche's website proudly proclaims: "We see our fusion power packs as the foundation for creating a world with abundant clean water, healthy oceans, vast rain forests, and immense glaciers in healthy equilibrium." A patent application filed by Langtry and Riordan contains some details of how their Orbitron may function. It describes an orbital containment system on the order of tens of centimeters in size, where a beam of fuel ions interacts with an electrostatic field to enter an elliptical orbit about an inner electrode. The application describes a system where ions last for a second or more — 10 times as long as in McGuire's simulations, and long enough for each ion to complete millions of orbits in the reactor. An article in GeekWire published as Avalanche exited stealth mode included a claim that the company had already produced neutrons via fusion.

Avalanche envisages small fusion packs with 5- to 15-kilowatt capacity, operating either on their own or grouped by the hundreds for megawatt-scale clean-energy solutions. The Pentagon is interested in the packs to potentially enable small spacecraft to maneuver freely in deep space, with higher power payloads.

The challenge now is for Avalanche to move from a 15-year old Ph.D. thesis in simulation to a working prototype in space, in just 60 months.

"While silicon-based solar cells dominate the photovoltaics market, silicon is far from the only material that can effectively harvest electricity from sunlight," notes Ars Technica: Thin-film solar cells using cadmium and telluride are common in utility-scale solar deployments, and in space, we use high-efficiency cells that rely on three distinct materials to harvest different parts of the spectrum. Another class of materials, which we're currently not using, has been the subject of extensive research: perovskites. These materials are cheap and incredibly easy to process into a functional solar cell. The reason they're not used is that they tend to degrade when placed in sunlight, limiting their utility to a few years. That has drawn the attention of the research community, which has been experimenting with ways to keep them stable for longer.

In Thursday's edition of Science, a research team from Princeton described how they've structured a perovskite material to limit the main mechanism by which it decays, resulting in a solar cell with a lifetime similar to that of silicon. While the perovskite cell isn't as efficient as what is currently on the market, a similar structure might work to preserve related materials that have higher efficiencies.
Their research involved a capping layer that's just a few atoms thick, according to an announcement from Princeton University, calling the resulting solar cell "a major milestone for an emerging class of renewable energy technology... the first of its kind to rival the performance of silicon-based cells, which have dominated the market since their introduction in 1954..."

"The team projects their device can perform above industry standards for around 30 years, far more than the 20 years used as a threshold for viability for solar cells." Perovskites can be manufactured at room temperature, using much less energy than silicon, making them cheaper and more sustainable to produce. And whereas silicon is stiff and opaque, perovskites can be made flexible and transparent, extending solar power well beyond the iconic panels that populate hillsides and rooftops across America....

[Engineering professor/team lead] Loo said it's not that perovskite solar cells will replace silicon devices so much that the new technology will complement the old, making solar panels even cheaper, more efficient and more durable than they are now, and expanding solar energy into untold new areas of modern life. For example, Loo's group recently demonstrated a completely transparent perovskite film (having different chemistry) that can turn windows into energy producing devices without changing their appearance. Other groups have found ways to print photovoltaic inks using perovskites, allowing formfactors scientists are only now dreaming up.

IEEE Spectrum reports: For decades, hopeful techies have been promising a world where absolutely every object you encounter — bandages, bottles, bananas — will have some kind of smarts thanks to supercheap programmable plastic processors. If you've been wondering why that hasn't happened yet, it's that nobody has built working processors that can be made in the billions for less than a penny each.... The problem, according to engineers at the University of Illinois Urbana-Champaign and at British flexible-electronics manufacture PragmatIC Semiconductor, is that even the simplest industry-standard microcontrollers are too complex to make on plastic in bulk.

In research to be presented at the International Symposium on Computer Architecture later this month, the transatlantic team presents a simple yet fully functional plastic processor that could be made at sub-penny prices. The Illinois team designed 4-bit and 8-bit processors specifically to minimize size and maximize the percentage of working integrated circuits produced. Eighty-one percent of the 4-bit version worked, and that's a good enough yield, says team leader Rakesh Kumar, to breach the one-penny barrier.

"Flexible electronics has been niche for decades," says Kumar. He adds that this yield study shows "that they may be ready for the mainstream."
Thanks to Slashdot reader Iamthecheese for sharing the article

An anonymous reader quotes a report from Interesting Engineering: [T]he world is now one step closer to seeing operational space-based solar energy as scientists from China's Xidian University completed testing and inspection on a ground array built to collect space-based solar power. They conducted a successful test of the "world's first full-link and full-system solar power plant" on June 5, according to a press statement from the university. The space-based solar power plant is a 246-feet-tall (75 meters) steel tower built on Xidian University's southern campus.

In theory, the Xidian University power plant will connect to orbital satellites that will harvest solar power 24/7 due to their geostationary orbits, before beaming that energy down to Earth via high-frequency microwave beams. The power plant will feature five different subsystems aimed at developing space-based solar power arrays. Space-based solar power has great potential as it can collect energy continuously while sidestepping common problems such as bad weather and waiting for daybreak. However, hurdles do remain, such as assessing the effects of a high-frequency energy beam on communications, air traffic, and the well-being of nearby residents.

Xidian University's new ground station is part of a space-based solar power proposal called OMEGA, which stands for Orb-Shape Membrane Energy Gathering Array. The project was first proposed in 2014 by Duan Baoyan from the Xidian University School of Electromechanical Engineering and his colleagues. [...] China's OMEGA project, meanwhile, has successfully transmitted energy wirelessly as microwaves over a distance of approximately 180 feet (55 meters). This capability puts the project three years ahead of its original schedule, the university says in its press release. Still, Baoyan concedes that a lot of work is still required, and fully operational space-based solar power could still be years away.

An anonymous reader quotes a report from ZDNet: The memory of "Batterygate" continues to be a thorn in Apple's side. In case you need a reminder, "Batterygate" refers to a 2016/17 scandal where Apple added an undocumented battery throttling capabilities to iOS 10.2.1 designed to slow the performance of the iPhone if the battery was deemed to be worn. It also came with unexpected side effects, causing handsets to reboot in cold weather or when the battery's charge level was low. The feature was initially rolled out to iPhone 6, iPhone 6s, and iPhone SE and later expanded to include the iPhone 7, 7 Plus, 8, 8 Plus and iPhone X models.

This latest UK-based multimillion-pound legal claim has been launched by Justin Gutmann, a consumer rights campaigner, and alleges that Apple deliberately misled users, and rather than roll out a battery recall or replacement program; the company instead pushed out this feature to cover up the fact that older iPhone batteries were not able to cope with the new power demands put on them.

Apple did eventually roll out a $29 battery replacement program, a program that saw the company carry out 11 million battery replacements in 2018, compared to the 1 to 2 million that would normally be carried out in a year. This resulted in Apple issuing a profit warning in January 2019, the company's first since 2002. If Apple loses, the company could be forced to pay damages of more than $950m to the 25 million people who purchased affected iPhones. Following the US settlement in March 2020, Apple agreed to settle a class-action lawsuit over the same issue, paying out $25 per iPhone, with the total capped at $310m. "We have never -- and would never -- do anything to intentionally shorten the life of any Apple product or degrade the user experience to drive customer upgrades," Apple said in a statement on Thursday. "Our goal has always been to create products that our customers love, and making iPhones last as long as possible is an important part of that."

Taiwan Semiconductor Manufacturing Co. today officially introduced its N2 (2nm class) manufacturing technology, its first node that will use gate-all-around field-effect transistors (GAAFETs), at its 2022 TSMC Technology Symposium. From a report: The new fabrication process will offer a full-now performance and power benefits, but when it comes to transistor density, it will barely impress in 2025 when it comes online. Being an all-new process technology platform, TSMC's N2 brings in two essential innovations: nanosheet transistors (which is what TSMC calls its GAAFETs) and backside power rail that both serve the same goal of increasing performance-per-watt characteristics of the node. GAA nanosheet transistors feature channels surrounded by gates on all four sides, which reduces leakage; furthermore, their channels can be widened to increase drive current and boost performance or shrunken to minimize power consumption and cost. To feed these nanosheet transistors with enough power and now waste any of it, TSMC's N2 uses backside power delivery, which the foundry considers to be among the best solutions to fight resistances in the back-end-of-line (BEOL).

Indeed, when it comes to performance and power consumption, TSMC's nanosheet-based N2 node can boast of a 10% to 15% higher performance at the same power and complexity as well as a 25% to 30% lower power consumption at the same frequency and transistor count when compared to TSMC's N3E. However, the new node increases chip density by only around 1.1X compared to N3E. In general, TSMC's N3 does offer full-node performance increases and power consumption reductions. But density-wise, the new technology can hardly impress. For example, TSMC's N3E node offers a 1.3X chip density increase over N5, which is a substantial increase.

Jakub Kaminski is a robotics engineering graduate student at Worcester Polytechnic Institute in Massachusetts. With some volunteers he spent two months designing the perfect tourniquet for the battlefields of Ukraine, designed meet the highest medical standards — and then uploaded it to 3DPrintingForUkraine.com.

Now in less than 8 weeks "around 120 individuals and companies worldwide with 3D printers have accessed the design," reports the Washington Post. [Alternate URL here] "Together, they have made roughly 5,000 reusable tourniquets that are bound for Ukraine, where they will be stitched and sent off to the battlefield, Kaminski said..." Using digital files, people are designing supplies such as bandages, tourniquets, splints and add-ons to AK-47 guns.... [In February, as Russia began its invasion] people in the 3D-printing community talked with Ukrainian military officials, hospital administrators and charity organizations, trying to gauge what they could print quickly that would be most helpful. Tourniquets and bandages were repeated requests. Mykhailo Shulhan, the chief operating officer of a Ukrainian 3D-printing company in Lviv, said that as soon as the invasion began, he started researching how 3D printers helped in other conflicts....

These days, his company, 3D Tech Addtive, develops and prints an array of weapons accessories: AK-47 holsters so soldiers have a way to rest their guns; bullet magazines since empty cartridges often get thrown away instead of reused; carrying bags for grenades; and most recently, anti-reflective lenses for sniper scopes to reduce glare and prevent Ukrainian snipers from being seen. (All together, they have provided over 5,000 components to the front lines, Shulhan estimated....)

While most 3D printers create supplies to stop death or ease fighting conditions, others are focusing on rehabilitating soldiers. Brett Carey, a physical therapist in Hawaii, designs 3D printed splints that can be sent to fighters... Carey has created two digital designs for splints that have been uploaded online and 3D printed over 1,500 times. If injuries are advanced, he has people send him images of their injuries using EM3D — a 3D imaging app — which allows him to make a custom made splint which is then shipped to Ukraine...
The Post also got this quote from the robotics engineering student whose team designed the tourniquets.

"It's a beautiful thing," he said. "If you make people in Ukraine feel better, and enable people to help. ... This is something really special."

It's Warren Buffett versus Google, Facebook and Microsoft, according to a recent article by Bloomberg. (Alternate URL here.) Google, Facebook and Microsoft Corp. — three of the world's biggest corporate buyers of clean power — are sounding the alarm that a nearly $4-billion, Warren Buffett-backed renewable-energy project proposed in Iowa isn't necessarily in the best interest of customers, including them.

If approved, it would be the largest complex of wind farms in the entire country when it comes online by the end of 2024, producing enough electricity for more than 700,000 homes. MidAmerican Energy, a utility owned by Buffett conglomerate Berkshire Hathaway Inc., has asked state regulators to approve terms including a guaranteed 11.25% rate of return before starting construction on a project it says will help in its efforts to trim carbon emissions by 75% compared to 2005 levels. But the big-name tech giants that operate data centers in the state warn the project, dubbed Wind Prime, could drive up electricity costs. MidAmerican, they say, should consider alternatives....

The fight is an important one to watch because it demonstrates the increasing influence technology giants have on the energy transition. Tech companies have pushed utilities in other parts of the U.S. to offer more clean energy options as they seek to clean up the sources of power for their energy-intensive operations. And since they buy so much power, the utilities often listen to them....

Facebook, which also buys large amounts of power to run data centers in Iowa, referred to the proposed project in a joint regulatory filing with Google as an "exceedingly costly, massive increase in generation that MidAmerican has not demonstrated is necessary." Last month, Microsoft filed its own petition with the Iowa Utilities Board saying it planned to join the tech-customer coalition.
Facebook and Google specifically complain that "Without a resource planning analysis, it is difficult if not impossible to assess all feasible alternatives to replace/expand existing generation capacity and which alternatives are a reasonable, cost-effective way to meet reliability requirements, forecasted customer need, a diversified fuel mix, and the like, or if it is simply being proposed to drive utility — or parent company — profitability....

"Wind Prime is an exceedingly costly, massive increase in generation that MidAmerican has not demonstrated is necessary or reasonable in light of other feasible alternatives. Before customers are forced to bear the increased costs that this project will result in, Wind Prime should be carefully considered by the Board through a complete record informed by a full and thorough discovery process."

Slashdot reader MojoKid writes: AMD unveiled new details of its technology roadmap Thursday at its 2022 Financial Analyst Day. Chief among them were disclosures on the company's next-gen RDNA 3 GPU architecture, Zen 4 CPU architecture and Phoenix Point laptop SoC. AMD's new RDNA 3 GPU architecture for Radeon graphic cards and mobile will be a chiplet-based design, much like the company's Ryzen CPU offering. AMD also confirmed that RDNA 3 GPUs would be fabricated on a 5nm process, likely TSMC N5. The company continued to note that an "optimized graphics pipeline" will enable yet higher clock rates, while the GPU's "rearchitected compute unit" will have ray-tracing performance improvements over RDNA 2 as well. AMD says that RDNA 3 GPUs are coming later this year, with RDNA 4 arriving likely in late 2023.

Meanwhile, AMD's Zen 4 is set to be the "world's first 5nm CPU," arriving later this year with an 8 to 10 percent instructrions per clock lift and greater than 15 percent single-threaded performance gain. Zen 4 will also support DDR5, AVX-512 extensions for AI workloads and a massive 125 percent increase in memory bandwidth. AMD is claiming a 35% multithreaded performance lift for Zen 4.

And, its Phoenix Point laptop platform SoC will be both Zen 4 and RNDA 3 infused. This is a first for AMD, since typically its laptop product's integrated graphics trail the company's current-gen GPU architecture by at least a generation. Phoenix point is set to arrive likely in the first half of 2023.

General Motors couldn't produce the component it needed for its 2022 SUV, the Chevrolet Tahoe, reports CNET. So the company's engineers "turned to a novel solution: 3D printing..." GM made a major investment in the tech in 2020, dedicating 15,000 square feet of space to a facility dubbed the Additive Industralization Center, then filling it with HP Multi Jet Fusion 3D printers, among others.... A year later, GM's big investment paid off. Chevrolet engineers made a late change to the 2022 Tahoe's design, necessitating the creation of an additional part: A new, flexible "spoiler closeout seal" fills a gap at the rear of the big SUV. Developing the tooling to injection-mold the things would have taken too long, delaying the delivery of 30,000 vehicles.

Enter 3D printing. Engineers were able to quickly design and print the components using a flexible material that met GM's criteria. They even used a process called vapor polishing to give the parts a perfect shine... Since each Tahoe requires two seals, Chevrolet needed a whopping 60,000 of them. From design to completion took just five weeks. That's less than half the time going the injection-molding route would have taken, which got all those SUVs out the door on time.
CNET calls it "almost certainly the largest deployment of additive tech in a production car" — and "an interesting preview of what's to come."

"Power-hungry, fossil-fuel dependent Japan has successfully tested a system that could provide a constant, steady form of renewable energy, regardless of the wind or the sun," reports Bloomberg: For more than a decade, Japanese heavy machinery maker IHI Corp. has been developing a subsea turbine that harnesses the energy in deep ocean currents and converts it into a steady and reliable source of electricity.... Called Kairyu, the 330-ton prototype is designed to be anchored to the sea floor at a depth of 30-50 meters (100-160 feet).

In commercial production, the plan is to site the turbines in the Kuroshio Current, one of the world's strongest, which runs along Japan's eastern coast, and transmit the power via seabed cables.... Japan's New Energy and Industrial Technology Development Organization (NEDO) estimates the Kuroshio Current could potentially generate as much as 200 gigawatts — about 60% of Japan's present generating capacity....

Japan is already the world's third largest generator of solar power and is investing heavily in offshore wind, but harnessing ocean currents could provide the reliable baseline power needed to reduce the need for energy storage or fossil fuels.
Thanks to long-time Slashdot reader AmiMoJo for sharing the article!

"Researchers at MIT have discovered an unfixable vulnerability in Apple Silicon that could allow attackers to bypass a chip's 'last line of defense'," writes the Apple Insider blog, "but most Mac users shouldn't be worried." More specifically, the team at MIT's Computer Science & Artificial Intelligence Laboratory found that Apple's implementation of pointer authentication in the M1 system-on-chip can be overcome with a specific hardware attack they've dubbed "PACMAN." Pointer authentication is a security mechanism in Apple Silicon that makes it more difficult for attackers to modify pointers in memory. By checking for unexpected changes in pointers, the mechanism can help defend a CPU if attackers gain memory access.... The flaw comes into play when an attacker successfully guesses the value of a pointer authentication code and disables it.

The researchers found that they could use a side-channel attack to brute-force the code. PACMAN echoes similar speculative execution attacks like Spectre and Meltdown, which also leveraged microarchitectural side channels. Because it's a flaw in the hardware, it can't be fixed with a software patch.

[A]ctually carrying out the PACMAN attack requires physical access to a device, meaning the average Mac user isn't going to be at risk of exploit. The flaw affects all kinds of ARM-based chips — not just Apple's. The vulnerability is more of a technological demonstration of a wider issue with pointer authentication in ARM chips, rather than an issue that could lead to your Mac getting hacked.
MIT has made more information available at the site PACMANattack.com — including answers to frequently asked questions. Q: Is PACMAN being used in the wild?
A: No.
Q: Does PACMAN have a logo?
A: Yeah!
The MIT team says their discovery represents "a new way of thinking about how threat models converge in the Spectre era." But even then, MIT's announcement warns the flaw "isn't a magic bypass for all security on the M1 chip." PACMAN can only take an existing bug that pointer authentication protects against, and unleash that bug's true potential for use in an attack by finding the correct PAC. There's no cause for immediate alarm, the scientists say, as PACMAN cannot compromise a system without an existing software bug....

The team showed that the PACMAN attack even works against the kernel, which has "massive implications for future security work on all ARM systems with pointer authentication enabled," says Ravichandran. "Future CPU designers should take care to consider this attack when building the secure systems of tomorrow. Developers should take care to not solely rely on pointer authentication to protect their software."
TechCrunch obtained a comment from Apple: Apple spokesperson Scott Radcliffe provided the following: "We want to thank the researchers for their collaboration as this proof of concept advances our understanding of these techniques. Based on our analysis as well as the details shared with us by the researchers, we have concluded this issue does not pose an immediate risk to our users and is insufficient to bypass operating system security protections on its own."

Apple's M1 chips have an "unpatchable" hardware vulnerability that could allow attackers to break through its last line of security defenses, MIT researchers have discovered. TechCrunch reports: The vulnerability lies in a hardware-level security mechanism utilized in Apple M1 chips called pointer authentication codes, or PAC. This feature makes it much harder for an attacker to inject malicious code into a device's memory and provides a level of defense against buffer overflow exploits, a type of attack that forces memory to spill out to other locations on the chip. Researchers from MIT's Computer Science and Artificial Intelligence Laboratory, however, have created a novel hardware attack, which combines memory corruption and speculative execution attacks to sidestep the security feature. The attack shows that pointer authentication can be defeated without leaving a trace, and as it utilizes a hardware mechanism, no software patch can fix it.

The attack, appropriately called "Pacman," works by "guessing" a pointer authentication code (PAC), a cryptographic signature that confirms that an app hasn't been maliciously altered. This is done using speculative execution -- a technique used by modern computer processors to speed up performance by speculatively guessing various lines of computation -- to leak PAC verification results, while a hardware side-channel reveals whether or not the guess was correct. What's more, since there are only so many possible values for the PAC, the researchers found that it's possible to try them all to find the right one.

An anonymous reader quotes a report from New Scientist: Robots can now be covered in living skin grown from real human cells to make them look more like us. As robots increasingly take on roles as nurses, care workers, teachers and other jobs that involve close personal contact, it is important to make them look more human so we feel comfortable interacting with them, says Shoji Takeuchi at the University of Tokyo in Japan. At the moment, robots are sometimes coated in silicone rubber to give them a fleshy appearance, but the rubber lacks the texture of human skin, he says.

To make more realistic-looking skin, Takeuchi and his colleagues bathed a plastic robot finger in a soup of collagen and human skin cells called fibroblasts for three days. The collagen and fibroblasts adhered to the finger and formed a layer similar to the dermis, which is the second-from-top layer of human skin. Next, they gently poured other human skin cells called keratinocytes onto the finger to recreate the upper layer of human skin, called the epidermis. The resulting 1.5-millimeter-thick skin was able to stretch and contract as the finger bent backwards and forwards. As it did this, it wrinkled like normal skin, says Takeuchi. "It is much more realistic than silicone."

The robot skin could also be healed when it was cut by grafting a collagen sheet onto the wound. However, the skin began to dry out after a while since it didn't have blood vessels to replenish it with moisture. In the future, it may be possible to incorporate artificial blood vessels into the skin to keep it hydrated, as well as sweat glands and hair follicles to make it more realistic, says Takeuchi. It should also be possible to make different skin colors by adding melanocytes, he says. The researchers now plan to try coating a whole robot in the living skin. The research has been published in the journal Matter.