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REF ID:A522534 / Classification 14 Sept 53 FROM: NSA-41, Mr. Austin TO: Mr. Friedman Received 1 copy of the item listed below: Memo for…
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REF ID:A522534 (c) HALLMARK IZ. Single channel, self-synchronous push-to-talk spesch security equipment. Speech is sampled at 33.3 Keo rate…
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facsimile equipment and to mect a requirement to transmit charts 20! x 16" in not more than 30 minutes with e definition of 100 lines par…
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(b) 5 UCO KEY GENERATOR. Equipment for producing randomly perforated five-level tape with same type of ramomizer as used in TRIMMER. A…
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REF ID:A522534 sie Development Statue: First development mdels should be available mid 1953, tut clock may be later. Sscurit: tus: UeKe…
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REF 1D:A522534 —— TOP -SEGREL--—_ SECURE FY INFORMAEFON- 11 September 1953 MEMORANDUM FOR MEMBERS OF THE U.S. DELEGATION SUBJECT: UK/US…
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U.K. CRYPTOGRAPHIC EQUIPMENTS PART I. LITERAL CYPHER MACHINES. 1. Machine Requiring no External Source of Power. (a) PORTEX.~ A small hand…
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The general purpose U.K. cypher machine; similar to the Typex 2 except that all rotors turn during the encryption of a message and a…
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| mo FE RAPE —— TOP-SECRET. SECURTT¥_INFORMA TION PART IJ. TELETYPE TELEPRINTER SECURITY EQUIPMENTS. 3. Non-Synchronous with…
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op BAZ be —POP_-SHEERET—SEGURLEY TNFORMAPION— 5- Synchronous Equipment with Electro-Mechanical Crypto—-Component. (a) Circuit Mercury.…
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start/stop teleprinter ancillaries or 32 characters from tape. Operates at 50 or 75 bauds, and provides traffic flow security. Basic cypher…
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Sige: Not yet determined. Status: Two breadboard models are due for completion in August 1953, magnetic binary circuits are being employed…
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REF ID:A522534 Security Status: At 1952 Conference U.K. and U.S. agreed that equipment ie secure provided key film is subjected to adequate…