Process for generating DSA signatures with low-cost portable apparatuses
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United States of America Patent
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Apr 29, 1997
Grant Date -
N/A
app pub date -
Nov 30, 1994
filing date -
Dec 2, 1993
priority date (Note) -
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status (Latency Note)
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Abstract
The invention relates to a process for generating digital signatures from portable apparatuses (A1, A2, . . . Ai . . . An) of the microprocessor-based card type, including means for computation, communication and retention of data, which means comprise at least one electrically programmable non-volatile memory, consisting in preparing enciphered data constituting coupons and loading these coupons into the non-volatile memories so as later to use these coupons in order to sign a message sent by a verifier device. According to the process, the preparation of the coupons is carried out by a certified central authority B or by the card itself.
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