Electrical computers and digital processing systems: memory – Storage accessing and control – Control technique
Reexamination Certificate
2005-08-11
2009-06-02
Ellis, Kevin L (Department: 2187)
Electrical computers and digital processing systems: memory
Storage accessing and control
Control technique
C711S154000, C711S165000, C726S026000
Reexamination Certificate
active
07543122
ABSTRACT:
Increasing security for a hand-held data processing device with communication functionality where such a device includes an access-ordered memory cache relating to communications carried out by the device. The hand-held data processing device has a locked state that is entered by the device receiving or initiating a trigger. On occurrence of the trigger to enter the locked state the memory cache is reordered so as to disrupt the access-ordering of the cache to obscure device traffic information and thus increase the security of the device in the locked state.
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Brown Michael K.
Brown Michael S.
Little Herbert A.
Dimock Stratton LLP
Ellis Kevin L
Parikh Kalpit
Research in Motion Limited
Wilson Jenna L.
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