Patent ID: 6567913
Filing Date: 2003-05-20
Classification: G07B

Abstract:
A system comprising:means for creating a plurality of messages; means for selecting and associating one of a plurality of different security levels with each of the plurality of messages created: means for generating a digital signature for a created message at times when the one of the plurality of different security levels has been selected and associated with the created message, the digital signature for the created message being generated based upon the contents of the created message and the selected one of the plurality of different security levels, the generating means including a memory in which a plurality of private keys are stored and each of the plurality of private keys is associated with a corresponding one of the plurality of different security levels, and the generating means generates the digital signature for the created message using the private key that corresponds to the selected one of the plurality of different security levels; and means for storing public key certificate data that is associated with each of the plurality of private keys and means for sending to a recipient the created message, the digital signature, and a portion of the certificate data that corresponds with the private key that corresponds to the selected one of the plurality of different security levels.