Security device for a semiconductor chip

Details Security device for a semiconductor chip Security device for a semiconductor chip

1997-03-31

1999-03-09

Cain, David

Cryptography

Key management

Having particular key generator

380 4, 380 23, H04L 900, H04K 100

Patent

active

058811559

ABSTRACT:
Security device for preventing access to confidential information stored in a semiconductor chip, or protected chip. The security device comprises a second semiconductor chip, or protective chip, with the two chips facing each other and being coupled to each other by communication terminals. The protected chip is coupled to external circuits via the protective chip, and the two semiconductor chips are separated by a semiconductor resin having a non-homogeneous electrical resistivity. The protective chip is provided with means for measuring a plurality of resistances through the semiconductor resin and with means for determining, at least from the measured resistances, an encryption key intended to be communicated to the protect chip to protect the confidential information.

REFERENCES:
patent: 4591189 (1986-05-01), Holmen et al.
patent: 4989154 (1991-01-01), Yamashita et al.
patent: 5245293 (1993-09-01), Runner et al.
patent: 5384847 (1995-01-01), Hendrickson et al.
patent: 5434917 (1995-07-01), Naccache et al.
patent: 5469557 (1995-11-01), Salt et al.
patent: 5680055 (1997-10-01), Seitz et al.
patent: 5799080 (1998-08-01), Padmanabhan et al.
"Partitioning Function and Packaging of Integrated Circuits for Physical Security of Data", Jun. 1989, IBM Technical Disclosure Bulletin, vol. 32, NR. 1, pp. 46-49 XP000033241 -entire document.

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