Method and apparatus for data hashing using selection from a table of random numbers in combination with folding and bit manipulation of the selected random numbers

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United States of America Patent

PATENT NO 4922417
SERIAL NO

06922875

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Abstract

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A data hashing arrangement particularly suitable for efficient database storage and fast retrieval of large numbers of character strings. A database address is determined for a character string by replacing individual characters with random numbers selected from a predefined table of random numbers. The table locations of the selected random numbers are uniquely defined by the characters. The selected numbers are combined by iteractive bit reordering and exclusive-OR operations to form a result, which is then used to derive the database address where the character string is stored.

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Patent Owner(s)

Patent OwnerAddress
AT&T TECHNOLOGIES INCORPORATED A CORP OF NEW YORK1 OAK WAY BERKELEY HEIGHTS NEW JERSEY NJ 07922-2727
BELL TELEPHONE LABORATORIES INCORPORATED A CORP OF NEW YORK600 MOUNTAIN AVENUE U S A MURRAY HILL NJ 07974-2070

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Churm, Brian R Wheaton, IL 1 74
Diesel, Michael E Newark, IL 11 458

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