http://www.peertopatent.org/patent/30/prior_art/list A cipher method for verifying a decryption of an encrypted user data key used to encrypt user data prior to an encryption of the user data key with an encryption key. The cipher method involves a decryption of the encrypted user data key with a decryption key in response to an initiation of a decryption of the encrypted user data with the user data key as decrypted with the description key, a decryption of the verification text with the user data key as decrypted with the decryption key, and a validation/invalidation of a use of the user data key as decrypted with the decryption key to decrypt the encrypted user data in response to a matched/unmatched comparison of the verification text as decrypted with the user data key and an intermixing of a known text and a random text. en-us Cipher method and system for verifying a decryption of an encrypted user data key Subject/Title: RE: A New Triple-DES Key Wrap Algorithm<br/>Type: Email<br/>Description: A discussion of S/MIME's key integrity check security risk due to partially known plaintext from the salt Sun, 28 Oct 2007 06:17:43 -0700 http://www.peertopatent.org/prior_art/94/detail Cipher method and system for verifying a decryption of an encrypted user data key Title: Cryptographic Message Syntax<br/>Description: IETF RFC document (RFC 2630) specifying cryptographic message syntax. Sat, 27 Oct 2007 08:33:07 -0700 http://www.peertopatent.org/prior_art/93/detail Cipher method and system for verifying a decryption of an encrypted user data key Title: Password-based Encryption for S/MIME<br/>Description: Password-based key wrapping is a two-stage process, a first stage in which the user-supplied password is converted into a KEK, and a second stage in which the KEK is used to encrypt a CEK. Fri, 26 Oct 2007 03:54:23 -0700 http://www.peertopatent.org/prior_art/92/detail