1
Addison M Fischer: Public/key date-time notary facility. Nixon & Vanderhye, August 4, 1992: US05136643 (207 worldwide citation)

A time notarization apparatus and method is disclosed which uses a secure, microprocessor based hardware platform which performs public key crytographic operations to obtain trusted time stamping with a minimum of intervention by third parties. The hardware platform is encapsulated in a secure fashi ...


2
Addison M Fischer: Public/key date-time notary facility. Nixon & Vanderhye, March 19, 1991: US05001752 (202 worldwide citation)

A time notarization apparatus and method is disclosed which uses a secure, microprocessor based hardware platform which performs public key cryptographic operations to obtain trusted time stamping with a minimum of intervention by third parties. The hardware platform is encapsulated in a secure fash ...


3
Fischer Addison M: Public/key date-time notary facility.. Fischer Addison M, April 17, 1991: EP0422757-A2 (30 worldwide citation)

A time notarization apparatus and method is disclosed which uses a secure, microprocessor based hardware platform which performs public kay cryptographic operations to obtain trusted time stamping with a minimum of intervention by third parties. The hardware platform is encapsulated in a secure fash ...


4
Fisher Addison M: Appareil dhorodatation certifiee a cle publique-privee, Public/key date-time notary facility. Fisher Addison M, Fisher Addison M, GOWLING LAFLEUR HENDERSON, August 14, 2007: CA2018770

A time notarization apparatus and method is disclosed which uses a secure, microprocessor based hardware platform which performs public key cryptographic operations to obtain trusted time stamping with a minimum of intervention by third parties. The hardware platform is encapsulated in a secure fash ...