1
Addison M Fischer: Public key/signature cryptosystem with enhanced digital signature certification. Nixon & Vanderhye, September 19, 1989: US04868877 (415 worldwide citation)

A public key cryptographic system is disclosed with enhanced digital signature certification which authenticates the identity of the public key holder. A hierarchy of nested certifications and signatures are employed which indicate the authority and responsibility levels of the individual whose sign ...


2
Addison M Fischer: Public key/signature cryptosystem with enhanced digital signature certification. Nixon & Vanderhye, April 2, 1991: US05005200 (342 worldwide citation)

A public key cryptographic system is disclosed with enhanced digital signature certification which authenticates the identity of the public key holder. A hierarchy of nested certifications and signatures are employed which indicate the authority and responsibility levels of the individual whose sign ...


3
Addison M Fischer: Public key/signature cryptosystem with enhanced digital signature certification. Nixon & Vanderhye, May 25, 1993: US05214702 (301 worldwide citation)

A public key cryptographic system is disclosed with enhanced digital signature certification which authenticates the identity of the public key holder. A hierarchy of nested certifications and signatures are employed which indicate the authority and responsibility levels of the individual whose sign ...


4
Fischer Addison M: Public key/signature cryptosystem with enhanced digital signature certification.. Fischer Addison M, August 16, 1989: EP0328232-A2 (28 worldwide citation)

A public key cryptographic system is disclosed with enhanced digital signature certification which authenticates the identity of the public key holder. A hierarchy of nested certifications and signatures are employed which indicate the authority and responsibility levels of the individual whose sign ...


5
Fischer Addison M: Improved public key/signature cryptosystem with enhanced digital signature certification.. Fischer Addison M, September 12, 1990: EP0386867-A2 (22 worldwide citation)

A public key cryptographic system is disclosed with enhanced digital signature certification which authenticates the identity of the public key holder. A hierarchy of nested certifications and signatures are employed which indicate the authority and responsibility levels of the individual whose sign ...


6
Fischer Addison M: Improved public key/signature cryptosystem with enhanced digital signature certification field.. Fischer Addison M, March 9, 1994: EP0586022-A1 (12 worldwide citation)

A public key cryptographic system is disclosed with enhanced digital signature certification which authenticates the identity of the public key holder. A hierarchy of nested certifications and signatures are employed which indicate the authority and responsibility levels of the individual whose sign ...


7
Fischer Addison M: Systeme cryptographique a cle publique a meilleure authentification numerique des signatures, Public key/signature cryptosystem with enhanced digital signature certification. Fischer Addison M, MCCARTHY TETRAULT, August 2, 1994: CA1331213

ABSTRACT A public key cryptographic system is disclosed with enhanced digital signature certification which authenticates the identity of the public key holder. A hierarchy of nested certifications and signatures are employed which indicate the authority and responsibility levels of the individual w ...


8
Fischer Addison: Systeme cryptographique a cle publique/signature et composant numerique perfectionne dauthentification de signature, Public key/signature cryptosystem with enhanced digital signature certification. Fischer Addison, Fischer Addison, G RONALD BELL & ASSOCIATES, October 8, 1996: CA2000400

A public key cryptographic system is disclosed with enhanced digital signature certification which authenticates the identity of the public key holder. A hierarchy of nested certifications and signatures are employed which indicate the authority and responsibility levels of the individual whose sign ...