Apparatus and method for quantum mechanical encryption for the t

Details Apparatus and method for quantum mechanical encryption for the t Apparatus and method for quantum mechanical encryption for the t

1992-09-29

1993-09-07

Swann, Tod R.

Cryptography

Cryptanalysis

380 59, 359244, 359249, 356351, H04K 102

Patent

active

052436497

ABSTRACT:
An apparatus and method that permit the transmission of secure communications. The invention uses quantum mechanical effects to establish nonlocal correlations between a pair of photons. This is analogous to an automatic encryption code that exists at only one location and is immediately destroyed after either of the photons is detected. This latter feature also provides a means for detecting any unauthorized tap on the transmission line.

REFERENCES:
patent: 3764807 (1973-10-01), Pollack
patent: 3914618 (1975-10-01), Harris
patent: 4879479 (1989-11-01), Frazier et al.
patent: 5104222 (1992-04-01), Kersey et al.
"Quantum Cryptography Defies Eavesdropping"; Collins, Gary; Physics Today; Nov. 1992; pp. 21-23.
"Quantum Public Key Distribution System"; IBM Technical Disclosure Bulletin; vol. 28, No. 7 Dec. 1985.
"Violations of a New Inequality for Classical Fields"; John Hopkins University Letter; Feb. 1992, pp. 23-32.

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