Kryptographik

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Kryptographik Lehrbuch der Geheimschreibekunst (Cryptology: Instruction Book on the Art of Secret Writing) is an 1809 book on cryptography written by Johann Ludwig Klüber.^[1]

In 2011 the National Security Agency included a copy of Kryptographik, used by a German cryptographer during World War II, as part of a 50,000 page release of classified documents.^[2]^[3]

References

^ The New International Encyclopædia Volume 6. Dodd, Mead. 1925. p. 325.
^ "The National Security Agency Releases Over 50,000 Pages of Declassified Documents". NSA. 8 June 2011. Archived from the original on March 27, 2012.
^ "Update to 8 June 2011 Press Release" (PDF). NSA. 19 August 2011. Retrieved 23 September 2020.

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[1] The New International Encyclopædia Volume 6. Dodd, Mead. 1925. p. 325.

[2] "The National Security Agency Releases Over 50,000 Pages of Declassified Documents". NSA. 8 June 2011. Archived from the original on March 27, 2012.

[3] "Update to 8 June 2011 Press Release" (PDF). NSA. 19 August 2011. Retrieved 23 September 2020.

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