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View Prior Art for Claim 00001

A signal bearing medium tangibly embodying a program of machine-readable instructions executable by a processor to perform operations 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 operations comprising: decrypting 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;

decrypting a verification text with the user data key as decrypted with the decryption key;

validating a use of the user data key as decrypted with the decryption key to decrypt the encrypted user data in response to a matched comparison of the verification text as decrypted with the user data key and an intermixing of a known text and a random text; and

invalidating the use of the user data key as decrypted with the decryption key to decrypt the encrypted user data in response to a mismatched comparison of the verification text as decrypted with the user data key and the intermixing of the known text and the random text.

#92Password-based Encryption for S/MIME

Applies to Claims 1,15,8

Submitted by: G. R. Konrad RoederLast updated: over 4 years ago

Title Password-based Encryption for S/MIME

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.

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#93Cryptographic Message Syntax

Applies to Claims 1,15,8

Submitted by: Rob CameronLast updated: over 4 years ago

Title Cryptographic Message Syntax

Description

IETF RFC document (RFC 2630) specifying cryptographic message syntax.

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