Basic HTML version of Foils prepared May 19 99

Foil 103 Features of Public Key System in SET - II

From Remarks on Internet and Java Security Basic Information Track Computational Science Course CPS616 -- Spring Semester 1999. by Geoffrey Fox, Mehmet Sen
1 To form a dual signature, convert the two messages separately into two message digests
  • concatenate the two messages and form the message digest of the combination
  • Use this combined message digest to form dual digital signature
2 If documents are 1 and 2, send document 1, digest of document 2 and dual digital signature to party that can see message 1 but for whom message 2 is not be seen.
  • Analogously for other party and document 2
3 This strategy allows one to intrinsically link messages in a legally provable fashion but confidentiality is preserved
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