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.