Cryptography – Cryptanalysis
Patent
1990-01-24
1992-05-26
Gregory, Bernarr E.
Cryptography
Cryptanalysis
380 4, 380 52, 380 59, 340652, H04L 900, H02H 720, G11B 2328
Patent
active
051174570
ABSTRACT:
A tamper-resistant package for protecting information stored in electronic circuitry is described. An energy source provides energy (electrical current, optical energy, microwave energy or RF energy, for example) within a region occupied by the circuitry to be protected. The energy is applied to an energy distribution system comprising a path or paths for energy distribution. Sensing means are provided which respond to the distribution system for sensing an intrusion. The distribution system includes an arrangement for changing or altering the path or paths over which the energy travels or altering the topology of the path or paths. The sensing means is informed of the appearance of the distribution system and senses an intrusion by comparing the appearance of the path(s) with the predicted appearance. In one embodiment, electrical current is selectively applied to a subset of electrical conductors. The pattern of current flowing in the conductors is sensed and compared to an expected pattern which is determined by the subset of energized conductors. Intrusion is evidenced by a disparity between the pattern of energized paths sensed by the sensing means compared to the pattern predicted by the sensing means. Dynamically varying the identity of the energized paths makes it difficult for an attacker to bypass the tamper detection.
REFERENCES:
patent: 2038878 (1936-04-01), Strutt
patent: 2197028 (1940-04-01), Wolff
patent: 2242246 (1941-06-01), Lindsay et al.
patent: 2455376 (1948-12-01), Lindsay
patent: 3041592 (1962-06-01), Schmidt
patent: 3746863 (1973-07-01), Pronovost
patent: 3763795 (1973-10-01), Wetz, Jr.
patent: 3825920 (1974-07-01), Nelson et al.
patent: 4051472 (1977-09-01), Albanese et al.
patent: 4086586 (1978-04-01), Spirig
patent: 4109233 (1978-08-01), Erickson
patent: 4120389 (1978-10-01), Erickson
patent: 4168396 (1979-09-01), Best
patent: 4225859 (1980-09-01), Zetting et al.
patent: 4236463 (1980-12-01), Westcott
patent: 4382291 (1983-05-01), Nakauchi
patent: 4403138 (1983-09-01), Battarel et al.
patent: 4459583 (1984-07-01), van der Walt et al.
patent: 4514720 (1985-04-01), Oberstein et al.
patent: 4543565 (1985-09-01), Oberstein et al.
patent: 4562306 (1985-12-01), Chou et al.
patent: 4575621 (1986-03-01), Dreifus
patent: 4588176 (1986-12-01), Arnold et al.
patent: 4593384 (1986-06-01), Kleijne
patent: 4691350 (1987-09-01), Kleijne et al.
patent: 4783801 (1988-11-01), Kaule
patent: 4811288 (1989-03-01), Kleijne et al.
Chaum, David, "Design Concepts for Tamper Responding Systems", Advances in Cryptology/Proceedings of Crypto 83, 1984, pp. 387-392.
Kent, Stephen T., "Protecting Externally Supplied Software in Small Computers", PhD Thesis, M.I.T., 1980.
Price, W. L., "Physical of Transaction Devices", National Physical Laboratory, 1986.
Purdy, George B. et al, "A Software Protection Scheme", IEEE, 1982.
Simmons, Gustavus J., "How to (Selectively) Broadcast a Secret", IEEE, 1985.
The Encryptor Products, Jones Futurex, Inc.
"Secure Terminal Interface Module for Smart Card Applications", IBM Technical Disclosure Bulletin, vol. 28, No. 4, Sep. 1985, pp. 1488-1489.
Comerford Liam D.
Ledermann Peter G.
Levy Lawrence I.
White Steve R.
Gregory Bernarr E.
International Business Machines Corp.
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