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System and method for secure message key caching in a mobile communication device

  • US 20040205248A1
  • Filed: 01/08/2004
  • Published: 10/14/2004
  • Est. Priority Date: 07/10/2001
  • Status: Active Grant
First Claim
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1. A method for processing encrypted messages at a wireless mobile communication device, comprising the steps of:

  • receiving at the wireless mobile communication device an encrypted message comprising at least one encrypted session key and encrypted content;

    accessing the encrypted message;

    identifying an individual encrypted session key associated with the wireless mobile communication device;

    decrypting the individual encrypted session key; and

    storing the decrypted session key to memory;

    wherein the stored decrypted session key is used to decrypt the encrypted content of the encrypted message where the encrypted content is subsequently accessed.

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