NSA Cryptanalysis Report on the Voynich Manuscript
Dublin Core
Title
NSA Cryptanalysis Report on the Voynich Manuscript
Subject
Cryptanalysis, Historical Codebreaking, NSA, Report, Language Deciphering
Description
This declassified report titled "The Voynich Manuscript: The Most Mysterious Manuscript in the World" from the U.S. National Security Agency (NSA), originally written by Brigadier John H. Tiltman, discusses the cryptographic analysis efforts on the Voynich Manuscript. It explores past attempts to decode the text using frequency analysis, classical cipher techniques, and comparisons to known languages. Despite extensive research, the NSA was unable to decrypt the text, leaving the manuscript an open mystery.
Creator
NSA, Brigadier John H. Tiltman
Source
NSA
Publisher
NSA
Date
1967 (current version released by NSA on 2002)
Contributor
NSA, Brigadier John H. Tiltman
Rights
Copyright
Format
PDF
Language
English
Type
Government Report
Identifier
https://www.nsa.gov/portals/75/documents/news-features/declassified-documents/tech-journals/voynich-manuscript-mysterious.pdf
Coverage
United States
Hyperlink Item Type Metadata
URL
https://www.nsa.gov/portals/75/documents/news-features/declassified-documents/tech-journals/voynich-manuscript-mysterious.pdf
Citation
NSA, Brigadier John H. Tiltman , “NSA Cryptanalysis Report on the Voynich Manuscript,” Omeka, accessed February 6, 2026, https://omeka.ischool.utoronto.ca/items/show/126.