Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent
1988-05-24
1990-05-15
Buczinski, Stephen C.
Cryptography
Particular algorithmic function encoding
Nbs/des algorithm
380 24, 380 30, 235379, 235380, 235382, H04K 100
Patent
active
049264800
ABSTRACT:
A user controlled card computer C and communicating tamper-resistant part T are disclosed that conduct secure transactions with an external system S. All communication between T and S is moderated by C, who is able to prevent T and S from leaking any message or pre-arranged signals to each other. Additionally, S can verify that T is in immediate physical proximity. Even though S receives public key digital signatures through C that are checkable using public keys whose corresponding private keys are known only to a unique T, S is unable to learn which transactions involve which T. It is also possible for S to allow strictly limited messages to be communicated securely between S and T.
REFERENCES:
patent: 4264782 (1981-04-01), Konheim
patent: 4393269 (1983-07-01), Konheim
patent: 4423287 (1983-12-01), Zeidler
patent: 4529870 (1985-07-01), Chaum
patent: 4590470 (1986-05-01), Koenig
patent: 4612413 (1986-09-01), Robert et al.
patent: 4625076 (1986-11-01), Okamoto et al.
patent: 4656474 (1987-04-01), Mollier et al.
patent: 4667087 (1987-05-01), Quintana
patent: 4697072 (1987-09-01), Kawana
patent: 4710613 (1987-12-01), Shigenaga
patent: 4748668 (1988-05-01), Shamir et al.
patent: 4757185 (1988-07-01), Onishi
patent: 4759063 (1988-07-01), Chaum
patent: 4759064 (1988-07-01), Chaum
patent: 4782455 (1988-11-01), Morinouchi et al.
Chaum, "Design Concept For Tamper Responding System", Proc. of Crypto 82, Plenum Press, 1983.
Chaum et al., "A Secure And Privacy Protecting Protocol For Transmitting Personal Information Between Organizations", Advances in Crytology: Proceedings of Crypto 86, Springer Verlag Press, 1987.
Elgamal, "A Public Key Cryptosystem And Signature Scheme Based On Discrete Logarithms", Advances in Cryptology: Proceedings of Crypto 84, Springer Verlag Press, 1985.
Chaum et al., "An Improved Protocol For Demonstrating Possession Of Discrete Logarithms And Some Generalations", Advances in Cryptology: Proceedings of Eurocrypt 87, Springer Verlag Press, 1988.
Rivest et al., "A Method For Obtaining Digital Signatures And Public-Key Cryptosystems", Communications of the ACM, Feb. 1978, pp. 120-126.
Rabin, "Digitalized Signatures And Public-Key Functions As Intractable As Factorization", MIT Technical Report MIT/LCS/TR-212, Jan. 1979.
Peralta et al., "A Simple And Secure Way To Show The Validity Of Your Public Key", Proceedings of Crypto 87, Springer Verlag Press, 1988.
Buczinski Stephen C.
Gregory Bernarr Earl
LandOfFree
Card-computer moderated 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 Card-computer moderated systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Card-computer moderated systems will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-628193