Cryptographic Communication Key Entry Unit
Original Publication Date: 1983-Oct-01
Included in the Prior Art Database: 2005-Feb-07
This article discloses a personalization/key-entry unit (KEU) which is a hand-held data entry device that pluggably attaches to an encrypting device. The unit is designed to enter data through a keyboard and display the data so that it can be checked to ensure that the correct data was inserted into the encrypting device. The KEU contains an 18-key-button keyboard 2, a luminous 16-digit hex display 4 and logic for controlling the operation of the unit. The KEU allows entry of 4-character personalization data, which adapts the encrypting device to its communication environment, i.e., start-stop personalization, bisync personalization, or synchronous data link personalization and to different speeds.