The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 01, 2006
Filed:
Mar. 20, 2003
Lih-jyh Weng, Shrewsbury, MA (US);
Lih-Jyh Weng, Shrewsbury, MA (US);
Maxtor Corporation, Longmont, CO (US);
Abstract
A hashing system produces hash values by manipulating n-bit sequences in accordance with a selected distance d error correction code ('ECC') over an associated Galois Field. The current system produces a hash value for a given n-bit sequence by treating the sequence as either a corrupted n-bit ECC codeword or as 'n' information bits of an (n+r)-bit ECC codeword. The hashing system may decode the n bits as a corrupted codeword of an (n, k, d) perfect ECC to produce an n-bit error-free codeword, and then use as the hash value the information bits of the error-free codeword. Alternatively, the hashing system may treat the n-bit sequence as a corrupted code word of a cyclic distance d ECC, and map the codeword to an (n−k)-bit “error pattern” that the system then uses as the hash value. The hashing system may instead treat the n-bit sequence as n “information” bits and encode the bits in accordance with an (n+r, n, d) ECC, to produce an r-bit hash value that consists of the associated redundancy bits.