Patents Represented by Attorney Dimock Stranton LLP

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  • Security countermeasure for power analysis attacks
    Patent number: 8325928
    Abstract: A countermeasure for differential power analysis attacks on computing devices. The countermeasure includes the definition of a set of split mask values. The split mask values are applied to a key value used in conjunction with a masked table defined with reference to a table mask value. The set of n split mask values are defined by randomly generating n?1 split mask values and defining an nth split mask value by exclusive or'ing the table mask value with the n?1 randomly generated split mask values.
    Type: Grant
    Filed: November 18, 2010
    Date of Patent: December 4, 2012
    Assignee: Research In Motion Limited
    Inventor: Catherine Helen Gebotys