Searching for patterns in encrypted data

Details Searching for patterns in encrypted data Searching for patterns in encrypted data

1994-11-21

1995-08-15

Barron, Jr., Gilberto

Cryptography

Cryptanalysis

380 1, 380 25, G11B 2328

Patent

active

054426995

ABSTRACT:
A searching method determines, given a specified encryption method (or set of encryption methods) and a specified pattern (or set of patterns), whether a given text contains an encryption, with any key, of anything fitting the pattern or patterns. The procedure detects and locates patterns that are present within data that has been encrypted, provided that the encryption method is one of a variety of simple methods that are often employed by computer programs such as computer viruses. The method includes:

REFERENCES:
patent: 5278901 (1994-01-01), Shieh et al.
patent: 5319776 (1994-06-01), Hile et al.
patent: 5355412 (1994-10-01), Kangas
patent: 5359659 (1994-10-01), Rosenthal
patent: 5398196 (1995-03-01), Chambers
David Chess, "Virus Verification and Removal-Tools and Techniques", Virus Bulletin, dtd Nov. 1991, pp. 7-11.
Dan Greene, et al. "Multi-Index Hashing for Information Retrieval", dtd Jan. 4, 1994.
Sun Wu, et al. "Fast Text Searching with Errors", Department of Computer Science Bul, University of Arizona, dtd Jun. 1991.

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