Method and arrangement for arranging an interception-proof optic

Details Method and arrangement for arranging an interception-proof optic Method and arrangement for arranging an interception-proof optic

1994-05-16

1996-09-24

Boudreau, Leo

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359173, 371 32, 340555, H04B 1000

Patent

active

055596231

ABSTRACT:
A communication method and system for securely communicating between a first station and a second station over an optical link. Information is transmitted from the first station in a pulse position modulation (PPM) form which has a high proportion of noise in order to reduce a possibility of unauthorized tapping of the signal from the optical link. The transmitted information may contain error coding so that the receiver can detect if an error occurred in transmission. If an error is detected, the second station can request the first station to retransmit the erroneously received information.

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patent: 5265103 (1993-11-01), Brightwell
patent: 5349458 (1994-09-01), Karlsson

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