Privacy-protected transfer of electronic information
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United States of America Patent
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May 28, 1996
Grant Date -
N/A
app pub date -
Feb 28, 1994
filing date -
Aug 2, 1993
priority date (Note) -
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Abstract
Cryptographic apparatus and means are disclosed for each of three types of participants in an electronic system for privacy-protected transfer of certified information. This invention reveals protocols that improve efficiency and security in such systems, and allows a variety of useful extensions in functionality without difficulty. This is achieved by a restrictive blind signature protocol in combination with a testing protocol. The restrictive blind signature protocol allows the certifying party to encode data into certified information that it provides to a receiving party, such that it cannot be altered or modified by the receiving party. The testing protocol enables parties to prove a variety of characteristics about the encoded data in their certified information.
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