Domain-based encryption

United States Patent m

Bush et al.

[ii]

[45]

US005245658A

Patent Number: 5,245,658 Date of Patent: Sep. 14,1993

[54] DOMAIN-BASED ENCRYPTION

[76] Inventors: George Bush, 1675 York Ave., Suite 34B, New York, N.Y. 10128; Estelle F. Ross, 41 Buxton St., Lido Beach, both of N.Y. 11561

[21] Appl. No.: 817,440

[22] Filed: Jan. 6,1992

[51] Int. CI.' H04K 1/00

[52] U.S. CI 380/28; 380/21;

380/43

[58] Field of Search 380/18, 21, 28, 30,

380/36, 37, 42, 43, 49, 50

[56] References Cited

U.S. PATENT DOCUMENTS

4,386,416 5/1983 Giltner et al 380/49 X

4,441,095 4/1984 Widmer et al 380/28

4,607,137 8/1986 Janscn et al 380/21

4,771,462 9/1988 Hannan et al 380/50 X

5,003,597 3/1991 Merkle 380/28

5,113,444 5/1992 Vobach 380/28 X

Primary Examiner—Tod R. Swann

Attorney, Agent, or Firm—Kane, Dalsimer, Sullivan,

Kurucz, Levy, Eisele & Richard

[57] ABSTRACT

A domain-based encryption system which uses identical domains known only to the parties involved in the communication. An encrypted message is sent between communicating parties which consists of a stream of coordinates which locate specific points in the domains. The located points comprise a symbol set that forms the plaintext message.

3 Claims, 7 Drawing Sheets