Fortress Gb Ltd.

Fortress Applications Ltd.

Gregory Van Bard

Carmi David Gressel

Ran Granot

Avi Hecht

Itzhak Mintz

Nicolas Tadeusz Courtois

Timothy James Salmon

Orr David Dunkelman

A data integrity system including a transmitter, having a TX pseudorandom function generator, a TX switching function having a transmitting option and a TX combiner operative to receive, from a Host, an initialization data entity including at least one word, [TA], in an initialization phase, to receive, during normal operation, two data entities of interest each including at least one data word of interest [TA] and [TA] respectively; to receive a first data entity including at least one word [TC] comprising a randomized data entry, from the TX pseudorandom function generator, to generate a first XOR sum of the initialization data entity's word [TA] and the at least one randomized data entity [TC], in at least one iteration of an initialization phase; and, during normal operation, to generate and to output a second XOR sum [TA&#x2295;TC=TB] and a third XOR sum [TA&#x2295;TC=TB], wherein TBand TBare randomized data entities, wherein the words TA, TAand TAare operative to initialize the data integrity system including enabling the data integrity system to encrypt the TAword and to generate an identifying hash value output using the TAword.

System and methods for encryption with authentication integrity

A data hashing system operative to hash an incoming string of message words is an object of the present invention. The system generates a hash value tag comprising a deterministic random number string which uniquely identifies the incoming string. The system comprises at least first and second register arrays, at least one 1-way functionality in at least pseudo-randomizing function; and a set of at least first and second orthogonal feedback word stream generators operative to generate a set of at least first and second orthogonal feedback streams of message words respectively, including applying respective permutations to the incoming string. Wherein the first and second feedback streams are combined into the first and second register arrays respectively, the at least pseudo-randomizing functionality accepts input from the register arrays and generates at least pseudo-random output which, in combination with a present word in the incoming string, is provided to the stream generators, and the first feedback stream is a first function of a present word in the incoming stream and the second feedback stream is a second function of a present and previous words, in the incoming stream.

System and method to preclude message modification in data authentication systems through efficent use of feedback in cryptographic functions

Growing community of inventors

Hartsdale, NY, United States of America

Gregory Van Bard