Wm!’F (7) ISCOMElH31ETOK(CTG 7.2) ENIRETOK,M.I. (8) coMatN 6TH ARMY (~SIDlO) SANFRAN,CALIF* (9) USS MT. MCKINLEY T.I. llAVSHIPYARD,CALIF. MORF. NAYSHI~D (10) Uss ALBEMARLE NORF., VA. UNTIL 5 JAN. -Cl? TO T.I. (11) USS CURTISS T.I. NAVSHIPYARD, CALIF. (12) Uss COMS’I’OCK EN~TOK, M.I. (RADIo GUARD SHIP ENIRETOK) CRYPTO@lAPHIC SYSTEMS AND @dlNELS 1. ~onaal milita~ orypto channe18 and orypto systems ware employed, plUS speoial lhited issue me-time-tape syetema (SIGTOT) between Atomio Energy (kmuniasion Los Alamos and the USS Mr. MCKINLEY, USS ALBEIL’\~ and USS CURTISS. The one-time-tapesystems (SIG~T) ware the only system authmiz ed by the Atcmio Energy Cmmaission for Restricted Data nmmsagea. 2. The authentioaticmayst~ as prescribed in the CSP 1270 series was not employeed. Harever, the ‘Shaokle” authentioatlon system was authorized for joint use on voioe and CW oirouits. The current edition of pas. 6 was authorized for use. 3. “ In addition to the orypto systms prescribed in paragraph 1, a speoial issue key list used in com$znotionwith the joint rotors (CSP 5024/1592,SIGDFCS/SI@lCC’P) was distributed to seleoted holders to b e used when limited dietributim of informationwas desired. 97 Sedim XI