Hashing algorithm used for multiple files having identical...

Details Hashing algorithm used for multiple files having identical... Hashing algorithm used for multiple files having identical...

2006-02-28

2010-02-09

Patel, Haresh N (Department: 2454)

Electrical computers and digital processing systems: multicomput

Computer conferencing

Cooperative computer processing

C709S217000, C707S793000

Reexamination Certificate

active

07660853

ABSTRACT:
The present invention provides an improved technique for accessing information in a peer-to-peer network. According to specific embodiments of the present invention, each file accessible in the peer-to-peer network is assigned a respective hash ID or fingerprint ID which is used to describe the contents of that file. Files in the peer-to-peer network may be identified and/or accessed based upon their associated hash ID values. In this way it is possible to identify identical files stored in the peer-to-peer network which have different file names and/or other metadata descriptors. Since the content of all files having the same hash ID will be identical, an automated process may be used to retrieve the desired content from one or more of the identified files.

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D. Eastlake et al., “US Secure Hash Algorithm 1 (SHA1),” (memo), Sep. 2001, 1 page, http://www.faqs.org/rfcs/rfc3174.html.

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