Patents Assigned to Agorics, Inc.
  • Patent number: 6079018
    Abstract: A document is digitally signed with a digital signature that is unique to the signer/document pair. A document digest is generated by applying a predefined one-way hash function to the document. A pseudo-random key is generated by combining the document digest with at least one other value in accordance with a predefined computational procedure. The digital signature is then generated as a predefined function of the private key, the document digest, and the pseudo-random key k. A distinct pseudo-random key is generated for each distinct specified document, and for a given value of the private key, a distinct digital signature is generated for each distinct specified document. In a preferred embodiment the pseudo-random key generating step includes combining the document digest with a value corresponding to the private key to generate an intermediate value, and hashing the intermediate value with the predefined one-way hash function to generate the pseudo-random key k.
    Type: Grant
    Filed: October 8, 1997
    Date of Patent: June 20, 2000
    Assignee: Agorics, Inc.
    Inventors: Norman Hardy, Linda L. Vetter, E. Dean Tribble
  • Patent number: 6073242
    Abstract: An electronic communication authority server that provides centralized key management, implementation of role-based enterprise policies and workflow and projection of corporate authorities over trusted networks. The authority server includes a key database that associates keys, signatures and indicators of corporate authority (such as letterhead) with particular corporate roles. There can be multiple roles or a single role (e.g., employee) for each authority server. Users associated with one or more roles are permitted by the authority server to exercise authority or include the indicators of authority in their communications. The authority server also encrypts/decrypts and signs/verifies communications from/to a user using the keys and signatures associated with the role being exercised by the user for that communication. The authority server permits roles to be delegated or transferred, which facilitates the execution by the authority server of role-dependent workflow procedures.
    Type: Grant
    Filed: March 19, 1998
    Date of Patent: June 6, 2000
    Assignee: Agorics, Inc.
    Inventors: Ann Ewing Hardy, Norman Hardy, E. Dean Tribble