Menetelmä ja laite salauksen suorittamiseksi käyttäen takaisinkytkettyä rekisteriä, jossa on valittavissa olevat väliotot

A method and apparatus for generating a pseudo-random bit sequence is provided. A first input bit is determined as a function of bits stored in a shift register in accordance with a first feedback algorithm. In addition, a second input bit is determined as a function of bits stored in the shift regi...

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Bibliographic Details
Main Authors FINKELSTEIN, LOUIS D, PUHL, LARRY C
Format Patent
LanguageFinnish
Swedish
Published 25.04.1995
Edition6
Subjects
ADVERTISING
BASIC ELECTRONIC CIRCUITRY
CALCULATING
CODING OR CIPHERING APPARATUS FOR CRYPTOGRAPHIC OR OTHERPURPOSES INVOLVING THE NEED FOR SECRECY
COMPUTING
COUNTING
CRYPTOGRAPHY
DISPLAY
EDUCATION
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRIC DIGITAL DATA PROCESSING
ELECTRICITY
JAMMING OF COMMUNICATION
MULTIPLEX COMMUNICATION
PHYSICS
PULSE TECHNIQUE
SEALS
SECRET COMMUNICATION
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
WIRELESS COMMUNICATIONS NETWORKS
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Summary:A method and apparatus for generating a pseudo-random bit sequence is provided. A first input bit is determined as a function of bits stored in a shift register in accordance with a first feedback algorithm. In addition, a second input bit is determined as a function of bits stored in the shift register in accordance with a second feedback algorithm. Subsequently, a particular input bit to be provided to the shift register is deterministically selected from the group consisting of the first input bit and the second input bit such that a non-linear pseudo random sequence may be produced by the shift register. In addition, a communication unit which utilizes the pseudo-random bit sequence in encrypting a signal to be transmitted and decrypting a received signal is described.
Bibliography:Application Number: FI19950001946