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SYSTEM AND METHOD FOR COMPRESSING SECURE E-MAIL FOR EXCHANGE WITH A MOBILE DATA COMMUNICATION DEVICE

  • US 20100122089A1
  • Filed: 01/21/2010
  • Published: 05/13/2010
  • Est. Priority Date: 06/12/2001
  • Status: Active Grant
First Claim
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1. A method of reducing size of an encrypted message at a host system before the encrypted message is transmitted to a wireless mobile communication device, the method comprising:

  • (a) receiving at the host system the encrypted message from a message sender addressed to first and second message receivers, the encrypted message including an encrypted message body and an encrypted session key for each of the message receivers; and

    (b) generating at the host system a first reduced size encrypted message that contains the encrypted message body and the encrypted session key for the first message receiver, the first reduced size encrypted message not including the encrypted session key for the second message receiver;

    wherein the encrypted session keys were encrypted via public keys.

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