HIGH SECURITY ENCRYPTED MOBILE DATA
Original Publication Date: 1997-Mar-01
Included in the Prior Art Database: 2002-May-16
APCO's published methods for insuring conti- dentiality of data sent through the system, either mobile unit to mobile unit or mobile unit to fixed host, does not protect against any of the common methods of cryptographic attack. In particular the defined APCO system permits the same message to be sent inbound in the clear and outbound encrypt- ed. This allows one of the easiest cryptographic attacks.