Access restriction to circuit designs

Details Access restriction to circuit designs Access restriction to circuit designs

1997-08-11

1999-11-02

Gregory, Bernarr E.

Cryptography

Cryptanalysis

380 9, 380 23, 380 25, 380 49, 380 50, 395168, 39518701, H04L 932, H04L 900

Patent

active

059784768

ABSTRACT:
A computerized system restricts full revelation of certain information to a user, while also performing limited processing of the information for the user for evaluation. The information is encrypted and therefore may be widely distributed without fear of revelation. An authorization code from the user specifies the type(s) of processing that are permitted, wherein different types of processing produce different type(s) of output that reveal to different degrees the information. The type(s) of output include output which represent more than mere reproduction of the information. A particularly appropriate implementation of the present invention is in the area of Electronic Design Automation (EDA) for logic design.

REFERENCES:
patent: 3798605 (1974-03-01), Feistel
patent: 4128874 (1978-12-01), Pertl et al.
patent: 4956769 (1990-09-01), Smith
patent: 5018096 (1991-05-01), Aoyama
patent: 5065429 (1991-11-01), Lang
patent: 5469564 (1995-11-01), Junya

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