Focus on
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Piece
Account of the methods used for breaking German teleprinter cypher messages
Catalogue reference: HW 25/5
What’s it about?
This record is about the Account of the methods used for breaking German teleprinter cypher messages dating from 1941 Jun 01-1945 Jun 30 in the series Government Code and Cypher School: Cryptographic Studies. It is held at The National Archives, Kew.
Is it available online?
No, this record is not available online. However, you can order a copy. Other ways to view it.
Can I see it in person?
Yes, this record is held at The National Archives and is available to see in person. How to view it.
Full description and record details
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Reference (The unique identifier to the record described, used to order and refer to it)
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HW 25/5
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Date (When the record was created)
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1941 Jun 01-1945 Jun 30
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Description (What the record is about)
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Account of the methods used for breaking German teleprinter cypher messages
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Held by (Who holds the record)
- The National Archives, Kew
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Former department reference (Former identifier given by the originating creator)
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GENERAL REPORT ON TUNNY VOLUME II
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Legal status (A note as to whether the record being described is a Public Record or not)
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Public Record(s)
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Access conditions (Information on conditions that restrict or affect access to the record)
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Closed Until 2000
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Closure status (Whether the record is ‘open’ (available to the public) or ‘closed’ (not available due to a legal exemption))
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Open Document, Open Description
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Subjects (Categories and themes found in our collection (our subject list is under development, and some records may have no subjects or fewer than expected))
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- Topics
- Intelligence
- Communications
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Record URL
- https://beta.nationalarchives.gov.uk/catalogue/id/C10905626/
How to order it
- View this record page in our current catalogue
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- Select an option and follow instructions
Series information
HW 25
Government Code and Cypher School: Cryptographic Studies
See the series level description for more information about this record.
Catalogue hierarchy
Over 27 million records
This record is held at The National Archives, Kew
17,110 records
Within the department: HW
Records created or inherited by Government Communications Headquarters (GCHQ)
42 records
Within the series: HW 25
Government Code and Cypher School: Cryptographic Studies
You are currently looking at the piece: HW 25/5
Account of the methods used for breaking German teleprinter cypher messages
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