Transmitting device of signal sequences

Details Transmitting device of signal sequences Transmitting device of signal sequences

1991-10-16

1993-06-01

Cangialosi, Salvatore

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 24, H04L 900

Patent

active

052167160

ABSTRACT:
Transmitting device of sequences of acoustic signals. The device comprises a transducer, a generator, a micrologic unit, a memory, a battery and a control means. The device transmits sequences that differ from one transmission to the next. The device has application to an electronic payment method by telephone.

REFERENCES:
patent: 4601011 (1986-07-01), Grynberg
patent: 4736419 (1988-04-01), Roe
patent: 4928098 (1990-05-01), Dannhaeuser
patent: 4998279 (1991-03-01), Weiss
patent: 5056137 (1991-10-01), Sills
patent: 5103221 (1992-04-01), Memmola

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