Tamper-resistant packaging for protection of information stored

Details Tamper-resistant packaging for protection of information stored Tamper-resistant packaging for protection of information stored

1986-11-05

1989-08-22

Buczinski, Stephen C.

Cryptography

Cryptanalysis

380 4, 380 52, 3072021, H01L 2302, H05K 502, H04L 900

Patent

active

048603511

ABSTRACT:
A tamper-resistant package for protection of information stored in electronic circuitry includes apparatus for distributing electro-magnetic energy within a region occupied by the circuit to be protected. A sensing arrangement senses the distribution of the energy. In a preferred embodiment, electrical current is distributed through a coil or coils within which the circuit to be protected resides. The sensor includes an integrating circuit, and the output of the integrating circuit is presented to both a sample and hold circuit and to a comparator. The comparator has high and low reference input terminals which are fed from a voltage divider to which is also applied an output from the sample and hold circuit. The high and low reference inputs to the comparator are, by reason of the sample and hold circuit, adaptive. The comparator produces an output if its input is outside the limits established by the high and low reference inputs; that output of the comparator is taken as evidence of tampering. An impairing device responds to the comparator output to obliterate, destroy or otherwise impair the information stored in the electronic circuit which is being protected.

REFERENCES:
patent: 3108257 (1963-10-01), Buchholz
patent: 3366939 (1968-01-01), Chaptal de Chanteloup
patent: 3451041 (1969-06-01), Marosi et al.
patent: 3496554 (1970-02-01), Stein
patent: 3666967 (1972-05-01), Keister et al.
patent: 3670837 (1972-06-01), Olson
patent: 3725671 (1973-04-01), Keister et al.
patent: 3763795 (1973-10-01), Wetz, Jr.
patent: 3825920 (1974-07-01), Nelson et al.
patent: 3882323 (1975-05-01), Smolker
patent: 3882324 (1975-05-01), Smolker et al.
patent: 3943503 (1976-03-01), Whitman
patent: 4110738 (1978-08-01), Sattin
patent: 4168396 (1979-09-01), Best
patent: 4179691 (1979-12-01), Keller
patent: 4205307 (1980-05-01), Liermann et al.
patent: 4225859 (1980-09-01), Zetting et al.
patent: 4236463 (1980-12-01), Westcott
patent: 4352097 (1982-09-01), Hamann
patent: 4393479 (1983-07-01), Du et al.
patent: 4459583 (1984-07-01), Van Der Walt et al.
patent: 4471163 (1984-09-01), Donald et al.
patent: 4512000 (1985-04-01), Masuko
patent: 4514720 (1985-04-01), Oberstein et al.
patent: 4543565 (1985-09-01), Oberstein et al.
patent: 4575621 (1986-03-01), Dreifus
patent: 4593384 (1986-06-01), Kleijne
patent: 4691350 (1987-09-01), Kleijne et al.
patent: 4734883 (1988-03-01), Perkin
patent: 4783801 (1988-11-01), Kaule
Chaum, "Design Concepts for Tamper Responding Systems"; Advances in Cryptology; pp. 387-392, 1984.
IBM Tech. Discl. Bull.; vol. 28, No. 4, 9/85; pp. 1488-1489.
Simmons, "How to Selectively Broadcast a Secret"; IEEE, 1985.
Purdy et al., "A Software Protection Scheme"; IEEE, 1982.
Kent, "Protecting Extrenally Supplied Software in Small Computers", Ph.D. Thesis, M.I.T., 1980.

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