Patents by Inventor Paul J. Polansky

Paul J. Polansky 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).

  • Data processor with flexible data encryption
    Patent number: 5892826
    Abstract: A data processor (20) which flexibly encrypts data within different address ranges includes an encryption determination circuit (50) to monitor an address conducted on an internal address bus (22) and when the address is within certain predefined ranges, perform encryption or decryption of address and/or data. For example the encryption determination circuit (50) may be used to selectively enable a data encryption-decryption circuit (60). When the data encryption-decryption circuit (60) is disabled, data conducted on an internal data bus (23) becomes "cleartext", i.e., non-encrypted. In one embodiment, the data encryption-decryption is performed in partial dependence on the address itself, and the address conducted to the external address bus is itself selectively encrypted as well.
    Type: Grant
    Filed: January 30, 1996
    Date of Patent: April 6, 1999
    Assignee: Motorola, Inc.
    Inventors: David L. Brown, Raul A. Pombo, Paul J. Polansky