Schneier writes a freely available monthly Internet newsletter on computer and other security issues , '' Crypto-Gram '' , as well as a security weblog , '' Schneier on Security '' . The blog focuses on the latest threats , and his own thoughts . The weblog started out as a way to publish essays before they appeared in Crypto-Gram , making it possible for others to comment on them while the stories were still current , but over time the newsletter became a monthly email version of the blog , re-edited and re-organized . Schneier is frequently quoted in the press on computer and other security issues , pointing out flaws in security and cryptographic implementations ranging from biometrics to airline security after the September 11 attacks
September 11 attacks
September 11 attacks
Bruce Schneier