dryriver writes: Summary from BBC article: Guardian editor Alan Rusbridger says he plans to publish more revelations from Edward Snowden despite MI5 warning that such disclosures cause enormous damage. Mr Rusbridger insisted the paper was right to publish files leaked by the US intelligence analyst and had helped to prompt a necessary and overdue debate. Mr Rusbridger said more stories would be published in the future as the leaked documents were "slowly and responsibly" worked through. His comments come after criticism from the new head of MI5, Andrew Parker. Making public the "reach and limits" of intelligence-gathering techniques gave terrorists the advantage, he said. He warned that terrorists now had tens of thousands of means of communication "through e-mail, IP telephony, in-game communication, social networking, chat rooms, anonymising services and a myriad of mobile apps". Mr Parker said it was vital for MI5 to retain the capability to access such information if it was to protect the country. Mr Rusbridger said those on the security side of the argument wanted to keep everything secret and did not want a debate. "You don't want the press or anyone else writing about it. But MI5 cannot be the only voice in the debate," he told BBC Radio 4's World at One. He added that his newspaper had revealed the "extent to which entire populations are now being potentially put under surveillance". "I just spent a week in America where everybody is talking about this, from the president down." Asked about Mr Parker's suggestion that publishing the documents was helping terrorists, Mr Rusbridger said: "They will always say that. You read histories of intelligence and you go back to the 1990s and the security people were saying the same."
egrep patterns are full regular expressions; it uses a fast deterministic
algorithm that sometimes needs exponential space.
-- unix manuals