Patent ID: 6859537
Filing Date: 2005-02-22
Classification: H04L

Abstract:
1. An apparatus for providing a crypto key and an associated checkword of said crypto key to an encryption device for a telemeter system of a missile, said apparatus comprising: a key loader having said crypto key and said associated checkword stored therein; an 8-bit microcontroller connected to said key loader to receive said crypto key and said associated checkword from said key loader, said 8-bit microcontroller sending a first variable request signal to said key loader to effect a transfer of said crypto key and said associated checkword from said key loader to said 8-bit microcontroller for storage within said 8-bit microcontroller; said 8-bit microcontroller including an internal EEPROM for storing said crypto key and said associated checkword and a copy of said crypto key and said associated checkword; said 8-bit microcontroller being connected to said encryption device, said 8-bit microcontroller sending a sense in signal to said encryption device to initiate a load of said crypto key and said associated checkword into said encryption device; said 8-bit microcontroller receiving from said encryption device a second variable request signal, said 8-bit microcontroller, responsive to said second variable request, loading said crypto key and said associated checkword into said encryption device; said 8-bit microcontroller being connected to a transmitter for the telemeter system of said missile, said 8-bit microcontroller providing a transmitter disable signal to said transmitter to disable said transmitter when said crypto key and said associated checkword are loaded into said encryption device preventing said crypto key and said associated checkword from being transmitted by said transmitter; a first light emitting diode connected to said 8-bit microcontroller, said first light emitting diode displaying a status for a load of said crypto key and said associated checkword into said encryption device; said 8-bit microcontroller being connected to a missile interface within said missile to receive a launch signal from said missile interface upon a launch of said missile, said 8-bit microcontroller, responsive to said launch signal, erasing said crypto key and said associated checkword and the copy of said crypto key and said associated checkword from the internal EEPROM of said 8-bit microcontroller; a second light emitting diode connected to said 8-bit microcontroller, said second light emitting diode displaying a status for an erase of said crypto key and said associated checkword from said 8-bit microcontroller; and said 8-bit microcontroller containing a computer software program for controlling, handling and interpreting said transfer of said crypto key and said associated checkword from said key loader to said 8-bit microcontroller for storage within the internal EEPROM of said 8-bit microcontroller, said computer software program controlling, handling and interpreting the storing of said crypto key and said associated checkword and said copy of said crypto key and said associated checkword within the internal EEPROM of said 8-bit microcontroller, said computer software program controlling, handling and interpreting the loading of said crypto key and said associated checkword into said encryption device from the internal EEPROM of said encryption device, said computer software program controlling, handling and interpreting a disabling of said transmitter when said crypto key and said associated checkword are loaded into said encryption device and an enabling of said transmitter after a successful load of said crypto key and said associated checkword into said encryption device, and said computer software program controlling, handling and interpreting the erasing of said crypto key and said associated checkword and the copy of said crypto key and the associated checkword from the internal EEPROM of said 8-bit microcontroller.