#007 · Security ProfessionalsIconicLocked in

Bruce Schneier

The Field’s Public Conscience

Applied Cryptography, Blowfish, and “security theatre”

Rating

95Impact score
Technical depth88
Defensive craft90
Research88
Influence98
FromUSA
Era1994–present

Domains

CryptographySecurity economicsPublic policy

Scouting report

Wrote Applied Cryptography in 1994, the book that taught a generation of engineers how ciphers actually work, then designed Blowfish and co-designed Twofish. Spent the two decades after arguing the harder point: that security is a systems and incentives problem, not a maths problem. Coined “security theatre”, has written the Crypto-Gram newsletter since 1998, and helped report on the Snowden documents.

Curator’s note

More people entered this field because of one book than any other single cause.

Portrait

Painted from a photograph of Bruce Schneier by sfllaw, licensed CC BY-SA 2.0.

Sources