Non-volatile memory for use with an encryption device

Details Non-volatile memory for use with an encryption device Non-volatile memory for use with an encryption device

2005-02-22

2005-02-22

Vu, Kim Yen (Department: 2135)

Cryptography

Key management

C380S280000

Reexamination Certificate

active

06859537

ABSTRACT:
A Non-Volatile Memory circuit operating as an interface between a key loader and an encryption device. The Non-Volatile Memory circuit includes a microcontroller which stores a crypto key and checkword and a backup crypto key and checkword. The microcontroller is connected to the telemeter transmitter for a missile allowing the micrcontroller to turn off the transmitter during a key load which prevents transmission of the crypto key and checkword. When the microcontroller completes a load of the crypto key to the encryption device and upon a launch of the missile, software within the microcontroller erases the crypto key and checkword from an internal EEPROM. This prevents an enemy force from retrieving the crypto key and its corresponding checkword from the missile after launch.

REFERENCES:
patent: 4465901 (1984-08-01), Best
patent: H001414 (1995-02-01), Borgen
patent: 5481610 (1996-01-01), Doiron et al.
patent: 5513261 (1996-04-01), Maher
patent: WO 9807099 (1998-02-01), None

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