Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent
1993-05-25
1994-12-13
Barron, Jr., Gilberto
Cryptography
Particular algorithmic function encoding
Nbs/des algorithm
380 24, 380 30, H01L 932
Patent
active
053735587
ABSTRACT:
Cryptographic methods and apparatus for signing (101), receiving (102), verifying (103), and confirming (104) designated-confirmer signatures are disclosed. Such a signature (11) convinces the receiver that the confirmer can convince others that the signer issued the signature. Thus, more protection is provided to the recipient of a signature than with prior art zero-knowledge or undeniable signature techniques, and more protection is provided to the signer than with prior art self-authenticating signatures.
A designated confirmer signature is formed in a setting where the signer creates and issues a public key (201) and the confirmer also creates and issues a public key (202). Should the confirmer offer a confirmation (13), the verifier is convinced that the signature was issued by the signer. Such confirmation can itself be, for example, self-authenticating, unconvincing to other parties, or designated confirmer. With plural confirmers, various combinations may be realized, some even including confirmer anonymity.
REFERENCES:
patent: 4947430 (1990-08-01), Chaum
patent: 4969189 (1990-11-01), Ohta et al.
patent: 5018196 (1991-05-01), Takaragi et al.
patent: 5142577 (1992-08-01), Pastor
Diffie et al, New Directions in Cryptography, IEEE Transactions on Information Theory, vol. IT-22, No. 6, pp. 644-654, Nov. 1976.
Boyar et al, Convertible Undeniable Signatures, ESPRIT II Basic Research Actions Program--Contract No. 3075 (Project ALCOM), pp. 189-205.
LandOfFree
Desinated-confirmer signature systems does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Desinated-confirmer signature systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Desinated-confirmer signature systems will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1198618