Data Encryption Standard (DES)
Data Encryption Standard (DES) is an encryption method that uses a secret key. It is
so hard to break (it provides 72 quadrillion possible keys) that the U.S. government
forbids its exportation to other countries. It is tough to break because the key is
randomly chosen from an enormous pool.
DES applies a 56-bit key to each 64-bit block of data. This is considered strong
encryption. Of course strong is a relative term, and if someone is really determined and
has the resources, it is possible to crack DES. Many organizations employ triple DES,
which applies three keys in succession.
Advanced Encryption Standard (AES)
Advanced Encryption Standard (AES) is poised to become the de facto encryption
standard. AES applies 128-, 192-, or 256-bit keys to 128-, 192-, or 256-bit blocks of
data.
As of 2004, there had been no reported cracks of AES, and it is the first time that the
U.S. Government’s National Security Agency (NSA) authorized an encryption tool for
transmission of top-secret, classified information.
Other Resources
• University of California, Berkeley Internet Security, Applications,
Authentication and Cryptography (ISAAC) Report on WEP insecurity
http://www.isaac.cs.berkeley.edu/isaac/wep-faq.html
• Wi-Fi Alliance
http://www.wi-fi.org/
• National Institute of Standards and Technology
http://www.nist.gov