1999年12月1日 · Bruce is the CTO of Counterpane Internet Security, author of Applied Cryptography, Second Edition (John Wiley & Sons, 1995), and inventor of the Blowfish and Twofish encryption algorithms.

The term "intrusion prevention" has become prevalent in marketing materials and sales presentations as commercial vendors develop an abundance of products (both good and bad) under this umbrella term. While commercial intrusion prevention products are often technologically diverse and contain a rich feature set, they also often come with a hefty price tag.