Patents by Inventor Paul J. Schobi

Paul J. Schobi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for the cryptographic processing of data and cryptographic systems
    Patent number: 5020106
    Abstract: In a process for the cryptographic processing of data in a cryptographic system, processing takes place in two parts. In the first part the data transmission routines within a data entity and a coded text entity are detected. The clear text and the cryptographic are separately processed cryptographically in the second part and then recombined in the first part with the data transmission routines.
    Type: Grant
    Filed: February 8, 1990
    Date of Patent: May 28, 1991
    Assignee: Gretag Aktiengesellschaft
    Inventors: Peter Rabold, Hans-Jorg Klemenz, Paul J. Schobi
  • Process and apparatus for the protection of secret elements in a network of encrypting devices with open key management
    Patent number: 4969188
    Abstract: Each encryption device of a communication network is divided into a base part and a security module in credit card form. The security module contains the functional stages required for the coding/decoding of the keys of lower hierarchical levels under keys of higher hierarchical levels and thus the secret elements of the network. The base parts contain no secret elements. The secret elements are stored in the security module preferably in a cryptologically secured form. A password also provided therein secures it against unauthorized use.
    Type: Grant
    Filed: February 4, 1988
    Date of Patent: November 6, 1990
    Assignee: GRETAG Aktiengesellschaft
    Inventor: Paul J. Schobi