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Programmable telecommunications security module for key encryption adaptable for tokenless use
| Details |
Inventors: Walter, Paul Alan; McGrogan, Jr., Ellwood Patrick; Kleidermacher, Mike;
Assignee: L-3 Communications Corporation (New York, NY)
Primary Examiner: Hayes; Gail O.
Assistant Examiner: DiLorenzo; Anthony
Attorney, Agent or Firm: Woodcock Washburn Kurtz Mackiewicz & Norris LLP
A security module that is preferably tokenless and is used in telephone communications (e.g., cellular) to secure a transmitted bit stream. The module provides traffic encryption, key exchange, key protection, and algorithm protection. The module provides encryption and key processing using a programmable information security architecture (PISA). Preferably, the module does not use a physical device, such as a key or a card, to unlock the security features, and preferably, the security features all reside within the security module and not on a physical device, such as a key or a card. Instead, a personal identification number (PIN) is used to unlock the security features. |
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DETAILED DESCRIPTION The present invention is directed to a telephone security module comprising: identification code input means for receiving an identification code; data input means for receiving data to be encrypted; a first processor coupled to the identification code input means for validating the identification code; a second processor coupled to the first processor containing secured key management data, the key management data comprising key exchange software and traffic encryption software; a third processor coupled to the data input means and the second processor for processing data received at the data input means into digital data, for processing decrypted received data, and for performing key exchange encryption; an encryption engine coupled to the second processor and the third processor for encrypting the digital data to provide output data for transmission and for decrypting received encrypted data; and output means, connected to the encryption engine, for receiving the received encrypted data from and transmitting the output data to a telephony network.
According to one aspect of the present invention, the data input means comprises at least one of a data port and a microphone for receiving text data and voice data, respectively.
Preferably, a codec is coupled between the data input means and the third processor for converting voice data from analog to digital.
In accordance with further aspects of the present invention, the identification code input means comprises a keypad or a memorycard, and the identification code is a personal identification number (PIN).
In accordance with further aspects of the present invention, the third processor comprises a memory, preferably a static RAM, for storing key exchange software received from the second processor responsive to the valid identification code, and the encryption engine comprises a memory, preferably a static RAM, containing traffic encryption software received from the second processor responsive to the valid identification code
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