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Info Sheet: Exercise a System Recovery Plan (August 2019)
Info Sheet: Integrate Threat Reputation Services (August 2019)
Info Sheet: Leverage Modern Hardware Security Features (August 2019)
Info Sheet: Transition to Multi-Factor Authentication (August 2019)
Info Sheet: Update and Upgrade Software Immediately (August 2019)
Info Sheet: Segment Networks and Deploy Application-Aware Defenses (September 2019)
Info Sheet: Actively Manage Systems and Configurations (August 2019)
Info Sheet: Defend Privileges and Accounts (August 2019)
Info Sheet: Enforce Signed Software Execution Policies (August 2019)
Translation of Intercepted German Cipher Message, to Churchill from Yardley
1918 Herbert Yardley - F. W. Allen Correspondence Related to Operations of MI-8, 1918 April-December
NOTE TO YARDLEY FROM PROB FRIEDMAN, 17 JUNE 1929
WORKING NOTES ON CODE FROM M.I.D. REPORT, 1 APRIL 1930
MESSAGE NO. 14 CHINESE DECLARATION OF WAR AND OTHER ARRANGEMENTS, 7 JANUARY 1943
MESSAGE NO. 58 ITEMS PERTAINING TO THE SETTLEMENTS IN CHINA BY THE FRENCH, 17 FEBRUARY 1943
INTERNAL ASA MEMO ON UPDATED INFO ON YARDLEY, 17 NOVEMBER 1949
MEMO TO D33 FROM J.R. CHILES, S1 "STATE DEPARTMENT MESSAGES" 3 JANUARY 1968
ACHIEVEMENTS OF THE CIPHER BUREAU (MI-8) DURING THE FIRST WORLD WAR, BY YARDLEY, 25 MAY 1945
MESSAGE INTERCEPTED ON RK3 TO RP7, 9 FEBRUARY 1915-1920
INTERCEPTIONS NOTES 12-17 FEBRUARY 1915-1920
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