Dec 1, 1998 · Twofish is a symmetric block cipher; a single key is used for encryption and decryption. Twofish has a block size of 128 bits, and accepts a key of any length up to 256 bits. (NIST required the algorithm to accept 128-, 192-, and 256-bit keys.) Twofish is fast on both 32-bit and 8-bit CPUs (smart cards, embedded chips, and the like), and in ...

Dec 1, 1999 · 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.