What did the declassified documents reveal?

This is “27apr messages,” a declassified intelligence briefing compiled by a United States intelligence agency in the year nineteen forty‑four. The document is notable because it contains a series of intercepted New York‑Moscow communications that reference the cover names “ANTENNA,” “LIBERAL,” and the project designation “ENORMOZ,” providing insight into covert identification practices during the war. The material was released to the public through The Black Vault archive. The file was uploaded as part of a broader collection of World War Two communications, identified under the entry “27apr messages” on archive.org. No specific Freedom of Information Act case number is listed; the declassification authority is noted as the originating agency’s records‑management office, with the release date recorded as the upload timestamp on the archive site. The canonical URL for the document is https://archive.org/download/27aprmessages/27aprmessagesdjvu.txt. The document begins: “/ . cum FU F CLASSFKATION ADJUTANT THE COVERRAMES “ANTENNA” AND “LIBERAL” IN •MESSAGES 1. In the recent report on the covername “ENORMOZ” etc.. Rev York - Moscow messages of 194 lr M|l ■te fere ^? ted ln which an Individual called LIBBRAL was aAtlcWd'as acting as an Intermediary between a person or persons that had worked on ENORMOZ and the originators of the messages. In message 130 T7531 of 21 120] September, signed by MAY, the ENORMOZ man seems to be named CHESTER, although there Is also mention of a VOLOK (?) working at the ENORMOZ plant. In message 1773 fQ67] of 16 (15] December, signed by ANTON (?), the ENORMOZ ian is called something like KALIBR. (KALIBR might, of course, be a covername later assigned to CHESTER -- or VOLOK. 2. Recent work on messages Involving L IB ER AL, stimulated by the results of the work on the ENORMOZ messages, has re- sulted ln new readings of possible Intelligence value. So much can now be known about LIBERAL and his wife and friends that it would seem possible to Identify him. Translations of the messages mv lved, excluding the ENORMOZ ones, follow with explanatory c"xient. 3. In the interesting message 700 on changes In cover - names (New York - Moscow 1251 (700] of 2 September), translated ln the first report of this series, LIBERAL s earlier covername is given. In our previous translations, this was given as ANTENKO. It now appears that the true form Is ANTENNA. Prom what we know of ANTENNA'S activities. It seems reasonable to suppose that the name ANTENNA was suggested by his knowledge of radio. 4. New York‑Moscow message 628 ( 34 ] of 5 May 194: --24F-- , sketch of ANTENNA. He la 25 years old. a fellow countryman (ZEMLIAE « member of the CP‑D3A] , --1P--, lives ln Tyre (New York]. — 3P— course at COOPER UNION In 190. He worked two years In •Abe laboratory of the Signal Corps at Port Mammoth ( MAM

Why was this case declassified?

This material was released by the National Security Agency (NSA) through the U.S. declassification and Freedom of Information Act (FOIA) process. The originating source document is linked on this page so the citation chain is auditable.

27apr Messages

◆ BLUF — The short version

This is “27apr messages,” a declassified intelligence briefing compiled by a United States intelligence agency in the year nineteen forty‑four. The document is notable because it contains a series of intercepted New York‑Moscow communications that reference the cover names “ANTENNA,” “LIBERAL,” and the project designation “ENORMOZ,” providing insight into covert identification practices during the war.

Agency: National Security Agency (NSA)
Date: JUL 18 · 2026
Release: Declassified · U.S. public record (FOIA)
Source document: View the primary source document

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What was 27apr Messages about?: This is “27apr messages,” a declassified intelligence briefing compiled by a United States intelligence agency in the year nineteen forty‑four. The document is notable because it contains a series of intercepted New York‑Moscow communications that reference the cover names “ANTENNA,” “LIBERAL,” and the project designation “ENORMOZ,” providing insight into covert identification practices during the war.
Why was this case declassified?: This material was released by the National Security Agency (NSA) through the U.S. declassification and Freedom of Information Act (FOIA) process. The originating source document is linked in the case notes above so the citation chain is fully auditable.

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