Patents by Inventor Ellwood McGrogan

Ellwood McGrogan 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).

  • Encryption and authentication methods and apparatus for securing telephone communications
    Publication number: 20010021252
    Abstract: An encryption device for a telephone having a handset and a base unit is disclosed. The device includes a handset interface, a first converter, an encryption processor, a second converter, and a host interface. The handset interface receives analog output signals from the handset. The first converter converts the analog output signals into digital output signals. The encryption processor includes a compressor, a key manager, an encryptor, and a modulator. The key manager generates key material for encrypting the digital output signals. The compressor compresses the digital output signals, the encryptor encrypts the digital output signals based on the key material, and the modulator modulates the encrypted digital output signals. The second converter converts the encrypted digital output signals into encrypted analog output signals. The host interface receives the encrypted analog output signals from the encryption processor, and forwards the encrypted analog output signals to the base unit.
    Type: Application
    Filed: April 12, 2001
    Publication date: September 13, 2001
    Applicant: L-3 Communications Corporation
    Inventors: Matthew Carter, Frank Constantini, Moishe Kleidermacher, Ellwood McGrogan, Ronald Paraggio
  • Encryption and authentication methods and apparatus for securing telephone communications
    Patent number: 6266418
    Abstract: An encryption device for a telephone having a handset and a base unit is disclosed. The device includes a handset interface, a first converter, an encryption processor, a second converter, and a host interface. The handset interface receives analog output signals from the handset. The first converter converts the analog output signals into digital output signals. The encryption processor includes a compressor, a key manager, an encryptor, and a modulator. The key manager generates key material for encrypting the digital output signals. The compressor compresses the digital output signals, the encryptor encrypts the digital output signals based on the key material, and the modulator modulates the encrypted digital output signals. The second converter converts the encrypted digital output signals into encrypted analog output signals. The host interface receives the encrypted analog output signals from the encryption processor, and forwards the encrypted analog output signals to the base unit.
    Type: Grant
    Filed: October 28, 1999
    Date of Patent: July 24, 2001
    Assignee: L3-Communications Corporation
    Inventors: Matthew Carter, Frank Costantini, Moishe Kleidermacher, Ellwood McGrogan, Ronald Paraggio