Changing Passwords How often should you change your password? I get asked that question a lot, usually by people annoyed at their employer’s or bank’s password expiration policy: people who finally memorized their current password and are realizing they’ll have to write down their new password. How could that possibly be more secure, they want to know. The answer depends on what the password is us
Man-in-the-Middle Attacks Against SSL Says Matt Blaze: A decade ago, I observed that commercial certificate authorities protect you from anyone from whom they are unwilling to take money. That turns out to be wrong; they don’t even do that much. Scary research by Christopher Soghoian and Sid Stamm: Abstract: This paper introduces a new attack, the compelled certificate creation attack, in which go
New Cryptanalytic Results Against SHA-1 Xiaoyun Wang, one of the team of Chinese cryptographers that successfully broke SHA-0 and SHA-1, along with Andrew Yao and Frances Yao, announced new results against SHA-1 yesterday at Crypto’s rump session. (Actually, Adi Shamir announced the results in their name, since she and her student did not receive U.S. visas in time to attend the conference.) Shami
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