Error check code recomputation method time independent of messag

Details Error check code recomputation method time independent of messag Error check code recomputation method time independent of messag

1994-06-20

1995-06-27

Nguyen, Hoa T.

Excavating

371 377, 371 378, G06F 1108, H03M 1300

Patent

active

054286298

ABSTRACT:
In a data packet communications network capable of transmitting a digitally coded data packet message including an error-check code from a source node to a destination node over a selected transmission link which includes at least one intermediate node operative to intentionally alter a portion of a message to form an altered message which is ultimately routed to the destination node, a method of recomputing at the intermediate node a new error-check code for the altered message with a predetermined number of computational operations, i.e. computational time, independent of the length of the message, while preserving the integrity of the initially computed error-check code of the message.

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F. J. MacWilliams, N. J. A. Sloane, "The Theory of Error-Correcting Codes," North Holland pp. 88-92.

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