Here's a good article on the status of the DES replacement, apparently due to be announced in the summer. "The National Institute of Standards and Technology (NIST, www.nist.gov) is developing the standard as a replacement to the popular DES algorithm. NIST has already considered 15 proposals for the Advanced Encryption Standard (AES). Five made the final round of evaluation: MARS from IBM; RC6 from RSA Laboratories (www.rsa.com); Rijndael from Joan Daemen and Vincent Rijmen; Serpent from Ross Anderson, Eli Biham, and Lars Knudsen; and Twofish from Counterpane Internet Security (www.counterpane.com)."