Harold M Greenberg, 41Summit, NJ

5220606, Jun 15, 1993

Feb 10, 1992

7/832974

Harold Greenberg - Bronx NY

H04L 900

380 43

I present a cryptographic communications system and method. The system includes a communications channel that is coupled to an encryption device and to a decryption device. A sender's plaintext message is encoded into ciphertext at the encryption device by first transforming the plaintext into a number sequence M. The encryption device couples the sender's signature S with an encoding key K to convert M into a ciphertext C. Ciphertext C is then transmitted over the communications channel to the intended receiver of the message. The receiver's decryption device acquires the ciphertext C. The decryption device takes the sender's signature S and the encoding key K and develops an inverted form of S which is the sequence T. The device uses T and K to decode C and obtain the digital message M. Sequence M is then converted to the original plaintext message.