REFERENCE INFORMATION (CONT’D)

TM ll-5895-1412-12&P REFERENCE INFORMATION (CONT’D) GLOSSARY OF COMSEC AND CEOI TERMS ALTERNATE NET - The net used when the primary net communications cannot be maintained due to jamming or interference. AUTHENTICATION - A security measure designed to protect a communications system against acceptance of a fraudulent transmission or simulation by establishing the validity of a transmission, message or originator. AUTHENTICATION SYSTEM - Authentication systems are provided to prevent unauthorized stations from entering friendly radio nets. There are two methods of authentication: challenge and reply and transmission authentication. BATTLEFIELD ELECTRONIC CEOI SYSTEM (BECS) - System includes the BGU and its peripherals. The purpose of BECS is to eliminate NSA-produced paper CEOI systems, to reduce response time and to increase user’s flexibility. BASIC GENERATION UNIT (BGU) - The personal computer (Hewlett-Packard HP- 110/111) component of BECS, plus the peripheral devices: the disk drive and printer. CALL SIGN - A three-character combination of letter-number-letter used to identify a command, activity unit or element in establishing and maintaining communications. CALL SIGN SHARING - Allows different nets to be assigned the same call signs for each time period. CLASS - A grouping of up to 20 zones. The total frequency requirement for a class equals the number of nets in the largest zone. Nets selected for a reuse plan are grouped into zones and classes. COMMUNICATIONS-ELECTRONICS (CE) - Embraces the design, development, installation, operation, and maintenance of electronics and electromechanical systems associated with the collecting, transmitting, storing, processing, recording, and displaying of data and information associated with all forms of military communications. COMMUNICATIONS-ELECTRONICS OPERATION INSTRUCTIONS (CEOI) - A series of orders issued for technical control and coordination of the Communications Electronics operations of a command or activity. It provides guidance needed to insure the speed, simplicity, and security of communications. The CEOI normally contains call sign assignments, frequency assignments, suffixes, signs and countersigns, pyrotechnic and smoke signals, and complete supplemental instructions. COMMUNICATIONS SECURITY (COMSEC) - Measures taken to prevent unauthorized persons from gaining information of value from your communication. COMSEC includes: (l)crypto-security; and (2)transmission security; and (3)emission security; and (4)physical security of communications security materials and information. 1-10