The KAL-61 is a piece of coding/decoding equipment used by the Canadian Military, United States Army and NATO forces for encrypting and authenticating non-secure communications. In Canada, the code used was called ‘CANFOROPS‘.
Specifications: The device length is 15.4 cm; its width is 11.2 cm.
This device was used to authenticate non-secure communications in the military. An example of this could include calling for artillery fire. This requires authentication to prevent the enemy from using friendly force guns to fire on friendly force troops and for encrypting messages. There are eight ways to authenticate and eight ways to set message groups with this device.
The KAL-61 system was also used by NATO forces in Europe.