Cryptography – Communication system using cryptography – Wireless communication
Reexamination Certificate
2008-10-01
2010-11-16
Smithers, Matthew B (Department: 2437)
Cryptography
Communication system using cryptography
Wireless communication
C380S255000
Reexamination Certificate
active
07835527
ABSTRACT:
One illustrative method involves the steps of receiving a ciphering mode information message from a wireless network; identifying and processing valid radio bearer downlink ciphering activation time information in the ciphering mode information message when it is part of a security mode command message; and refraining from processing any valid radio bearer downlink ciphering activation time information in the ciphering mode information message when it is part of a message that is different from the security mode command message (i.e. when it is part of a radio network subsystem relocation procedure). The method may include the additional steps of producing valid radio bearer uplink ciphering activation time information for inclusion within a response message when the ciphering mode information message is part of the security mode command message; refraining from producing any valid radio bearer uplink ciphering activation time information when the ciphering mode information message is part of a message that is different from the security mode command message; and causing the response message to be sent to the wireless network.
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Farnsworth Andrew John
Norton Mark Dennis
Oskorep, Esq. John J.
Research In Motion Limited
Smithers Matthew B
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