Method for masking secret multiplicands
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Feb 14, 2006
Grant Date -
N/A
app pub date -
Nov 7, 2000
filing date -
Nov 7, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A mobile terminal for use in a mobile communications system includes a SIM card storing subscriber related data. For security, the SIM card performs secret cryptographic calculations with secret numbers. Secret information is hidden from outside observation by scheduling the calculations using a precomputed, fixed randomization schedule in such a way that externally observable parameters of the device cannot be associated to particular pieces, bits, symbols or values of the secret information.
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