Secure cryptographic methods for electronic transfer of information
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United States of America Patent
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Sep 16, 1997
Grant Date -
N/A
app pub date -
Aug 31, 1995
filing date -
Feb 28, 1994
priority date (Note) -
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Abstract
Cryptographic methods and apparatus are disclosed relating to practical cryptographic systems for electronic transfer of information. Specifically, inventive techniques are described to allow the use of tamper-resistant computing devices without powerful processors; to guarantee security against criminals able to gain full control over computing devices of other parties; to allow value in privacy-protected off-line cash systems to be represented by counters instead of digital coins, without significantly compromising security against criminals who can by-pass tamper-resistance; and to allow secure currency conversion in privacy-protected off-line cash systems, without requiring tamper-resistance for receiver parties.
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