Signal encryption

Details Signal encryption Signal encryption

1990-01-16

1992-03-31

Gregory, Bernarr E.

Cryptography

Communication system using cryptography

Wireless communication

380 9, 380 50, H04K 100

Patent

active

051014327

ABSTRACT:
Method and apparatus for encrypting and subsequently decrypting an analog or digital signal are disclosed. During encryption the signal waveform is transformed by a substantially continuous non-linear complex function of frequency. The transformation is characterized in that the time duration of a transformed impulse signal is substantially increased. Decryption requires transformation of the encrypted signal by substantially the complex inverse of the encryption function. The transformations may vary in time during encryption/decryption of a signal.

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