System for preventing remote detection of computer data from tem

Details System for preventing remote detection of computer data from tem System for preventing remote detection of computer data from tem

1992-10-13

1994-03-22

Buczinski, Stephen C.

Cryptography

Cryptanalysis

455 1, H04K 102, H04K 300

Patent

active

052972011

ABSTRACT:
A system for preventing the remote detection and decoding of computer data from RF or conducted signal emissions is disclosed. A simulator is coupled to the computer for emulating signal emissions in order to mask the computer signal emissions. The simulator includes an emulation generator coupled to the computer to radiate signals that fully emulate those radiated by the computer to be protected. The emulated signal emissions are synchronized with the computer signal emissions by a special control unit which receives timing instructions from the computer. A random sequence generator randomizes and convolutes the sequence of the emulated signal emissions so that the composite signal emissions formed by the computer and the simulator cannot be decoded to render meaningful data indicative of that being processed by the computer. The simulator is coupled with a computer to be protected by connection to the I/O interface port of the computer.

REFERENCES:
patent: 2476337 (1949-07-01), Varian
patent: 3897591 (1975-07-01), Lundstrom et al.
patent: 4841569 (1989-06-01), Wachob
patent: 4932057 (1990-06-01), Kolbert
patent: 5032839 (1991-07-01), Even-Or
patent: 5036323 (1991-07-01), Cain et al.
patent: 5086467 (1992-02-01), Malek
patent: 5153921 (1992-10-01), Kawarabayashi
patent: 5165098 (1992-11-01), Hoivik

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