Bruce Schneier (born January 15, 1964) is an American cryptographer, computer security expert, and writer. He is the author of several books on computer security, and founder and CTO of Counterpane Internet Security, a computer security company. Originally from New York, he currently lives in Minneapolis, Minnesota with his wife Karen Cooper.

Schneier is the (co-)designer of the Blowfish and Twofish block ciphers, and the Yarrow and Fortuna cryptographically secure pseudo-random number generators.

He writes a freely available monthly Internet newsletter on computer and other security issues, Crypto-Gram (see link below).

Schneier is frequently quoted in the press on computer and other security issues, generally pointing out the dismally frequent flaws in security and cryptographic techniques ranging from biometrics to the post-September 11 airline security measures.

Schneier is a fan of science fiction & role-playing games, notably Dungeons and Dragons.

Schneier is from New York; he has a Master of computer science degree from American University and a Bachelor of Science degree in physics from the University of Rochester.


  • Schneier, Bruce - Applied Cryptography, 2e ISBN 0471117099
  • Schneier, Bruce - Secrets and Lies ISBN 0471253111
  • Ferguson, Niels, Schneier, Bruce - Practical Cryptography ISBN 0471223573
  • Schneier, Bruce - Beyond Fear: Thinking Sensibly about Security in an Uncertain World ISBN 0387026207

External links