- #4,200,770:
Cryptographic apparatus and method, filed Sept. 6, 1977; issued Apr.
29, 1980, with M. E. Hellman and B. W. Diffie. Covers public key distribution.
- #4,218,582:
Public key cryptographic apparatus and method, filed Oct. 6, 1977;
issued Aug. 19, 1980, with M. E. Hellman. Covers public key cryptosystems.
- #4,309,569:
Method of providing digital signatures, filed Sept. 5, 1979; issued
Jan. 5, 1982. (Used by Surety
and Valicert).
- #4,881,264:
A digital signature system and method based on a conventional encryption
function, filed July 30, 1987; issued Nov. 14, 1989.
- #5,003,597:
Method and apparatus for data encryption, filed Dec. 21, 1989; issued
March 26, 1991.
- #5,157,726:
Document copy authentication, filed Dec. 19, 1991; issued October
20, 1992.
- #5,357,548:
Reversible charge transfer and logic utilizing them, filed November
4, 1992; issued October 18, 1994.
- #5,634,012:
System for controlling the distribution and use of digital works having
a fee reporting mechanisms, filed November 23, 1994; issued May 27, 1997.
- #6,330,549:
Protected Shareware, filed Oct. 30, 1997; issued Dec. 11, 2001.
- #6,397,261:
Secure token-based document server, filed March 16, 1999; issued May
28, 2002.
- #6,510,359:
Method and system for self-replicating manufacturing stations, filed
May 11, 2000; issued January 21, 2003.
- #6,601,102:
Secure token-based document server, filed April 1, 2002; issued July
29, 2003.
- #6,839,839:
Public key distribution using an approximate linear function, filed
February 10th 2000; issued January 4, 2005
- #6,993,655:
Record and related method for storing encoded information using overt code
characteristics to identify covert code characteristics, filed December
20th, 1999; issued January 31, 2006
- #7,400,732: Systems and methods for non-interactive session key distribution with revocation, filed
September 27, 2002; issued July 15, 2008. With Jessica N. Staddon,
Thomas A. Berson,
Matthew Franklin,
Sara More,
Michael Malkin and
Dirk Balfanz.
- #8,171,568: Positional diamondoid mechanosynthesis, filed September 4, 2008; issued May 1, 2012 with R.A. Freitas.
- #8,276,211: Positional diamondoid mechanosynthesis, filed July 21, 2011; issued
September 25, 2012 with R.A. Freitas.
- #10,481,866: Mechanical Computing Systems, filed December 31, 2015; issued November 19, 2019 with
R.A. Freitas, J. Ryley,
M. Moses,
and
T. Hogg.