Data at Rest vs. Data in Motion
Posted: Fri 16 Jul 2010, 13:28
http://www.schneier.com/crypto-gram-1007.html#6
...encryption keys must exist as long as the encrypted data exists. And storing those keys becomes as important as storing the unencrypted data was. In a way, encryption doesn't reduce the number of secrets that must be stored securely; it just makes them much smaller....