Cryptonym: ANAGRAM
1954-1975: "ANAGRAM is code word for FBI program to penetrate foreign diplomatic establishments in the United States for purpose of securing cryptographic material. This material is primarily of value to the National Security Agency in its communications. Since inception of program in 1954, we have conducted ANAGRAM operations involving 38 different foreign countries and a total of 57 different establishments. Approximately 10 FBI field offices have participated in the program." At page 342: "In connection with its responsibilities in the Cuban and Latin American fields, the Miami and San Juan offices have devoted considerable manpower to the development of foreign intelligence in recent years."
9/28/65 FBI memorandum from supervisor Alan H. Belmont to supervisor Clyde Tolson: "for example, our Anagram program...we have held up on this program recently, and yet it is of inestimable value to the National Security Agency in its efforts to break into communication channels of foreign countries. This, in turn, provides the highest type of intelligence to our government. I do not think we should mention any such program as the Anagram program to the AG."
7/25/75 Church Committee memorandum on policies and procedures: Project ANAGRAM is described as the "penetration of foreign diplomatic establishments in the United States for the procurement of cryptographic materials."