41774259081336_page_48

41774259081336 | page 48 | https://thedailydialectics.com/pdfs/FIOA/41774259081336/41774259081336.pdf

—ROP_SECRET _=_SHOUREEY PBORMATION- PART VI. SPECIAL PURPOSE CRYPTQ-EQUIPMENTS 18. a. APSAM 499 (Authentication Device) A small, manually operated, mechanical device for station and message authentication. Consists of two individually retatable shafts, each carrying 13 mixed alphabet disks and two…