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Secure voice communication system

  • US 6,907,123 B1
  • Filed: 12/21/2000
  • Issued: 06/14/2005
  • Est. Priority Date: 12/21/2000
  • Status: Active Grant
First Claim
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1. A method of communicating voice transmissions to a receiving device from a transmitting device, comprising:

  • receiving a user input through a user interface associated with the transmitting device;

    using an encryption key value to select an initial encryption algorithm from an encryption selection table, the encryption selection table stored at the transmitting device, the encryption key value calculated as a function of at least one or both of a periodic key value and a public variable key value, the user input comprising at least one of the encryption key value, the periodic key value, or the public key value;

    encrypting the initial voice transmissions from the transmitting device using the initial encryption algorithm, the transmitting device capable of encrypting voice transmissions using a plurality of encryption methods; and

    transmitting the encrypted initial voice transmissions from the transmitting device.

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