DIS Data Dictionary - PDU Data
Created by JDBE at Ft. Huachuca, Arizona-
Current standard: IEEE 1278.1
Crypto Key ID field
Size: 16
Data Type: unsigned
Description: This field shall consist of sixteen (16) bits. The high-order bit, when cleared, shall indicate that the crypto equipment is in the baseband encryption mode, and when set shall indicate that the crypto equipment is in the diphase encryption mode. The lower- order 15 bits shall be interpreted as a key identifier. If the key identifier of the transmitter and receiver match, they shall be considered to be using the same encryption key. Note that this key identifier is not an actual crypto key, the nature of which varies among encryption systems and is classified.