Article | Proceedings of the 2nd International Conference on Historical Cryptology, HistoCrypt 2019, June 23-26, 2019, Mons, Belgium | Uruguayan Cryptography: Printed Book Covers Linköping University Electronic Press Conference Proceedings
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Title:
Uruguayan Cryptography: Printed Book Covers
Author:
Juan José Cabezas: Facultad de Ingenierfa, Universidad de la Republica, Montevideo, Uruguay Francisco Castro: Facultad de Ingenierfa, Universidad de la Republica, Montevideo, Uruguay Joachim von zur Gathen: B-IT, Universität Bonn, Germany Jorge Tiscornia: Presidencia Uruguay, Montevideo, Uruguay Alfredo Viola: Facultad de Ingenierfa, Universidad de la Republica, Montevideo, Uruguay
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Full text (pdf)
Year:
2019
Conference:
Proceedings of the 2nd International Conference on Historical Cryptology, HistoCrypt 2019, June 23-26, 2019, Mons, Belgium
Issue:
158
Article no.:
007
Pages:
59-68
No. of pages:
10
Publication type:
Abstract and Fulltext
Published:
2019-06-12
ISBN:
978-91-7685-087-9
Series:
Linköping Electronic Conference Proceedings
ISSN (print):
1650-3686
ISSN (online):
1650-3740
Series:
NEALT Proceedings Series
Publisher:
Linköping University Electronic Press, Linköpings universitet


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During the military dictatorship in Uruguay in the 1970s and 1980s, three encrypted documents were sent between members of the urban guerrilla MLN Tupamaros. In this work we present the second of these documents, whose text was encrypted by an array of colored circles on the covers of a book.

We introduce some of the history and the processes of image recognition and decryption of this document.



Keywords: substitution cipher Uruguay Tupamaros decryption Eva

Proceedings of the 2nd International Conference on Historical Cryptology, HistoCrypt 2019, June 23-26, 2019, Mons, Belgium

Author:
Juan José Cabezas, Francisco Castro, Joachim von zur Gathen, Jorge Tiscornia, Alfredo Viola
Title:
Uruguayan Cryptography: Printed Book Covers
References:

Juan José Cabezas, Joachim von zur Gathen, and Jorge Tiscornia. 2018. Uruguayan cryptographic carpet. Proceedings HistoCrypt 2018, 21-27, http://www.ep.liu.se/ecp/contents.asp?issue=149.

Francisco Castro. 2019. Printed book cover cryptanalysis: A formal approach. Master’s thesis, Facultad de Ingeniera, Universidad de la Repblica. In progress.

Andrew Clark and Ed Dawson. 1998. Optimisation heuristics for the automated cryptanalysis of classical ciphers. Journal of Combinatorial Ma thematics and Combinatorial Computing, 28:63-86.

Helena Ramalhinho Lourenço, Olivier C. Martin and Thomas Stützle, 2003. Iterated Local Search. In: Handbook of Metaheuristics, pages 320-353. Springer US, Boston, MA.

Jorge Tiscornia and Juan José Cabezas. 2015. El código secreto del tapiz del MLN hecho en el Penal de Libertad. Reportes Técnicos 15-10.

US Army. 1990. Basic Cryptanalysis. Chapter 5: Monoalphabetic Multilateral Substitution Ciphers. Headquarters Department of the Army. Washington DC.

Jacob Ziv and Abraham Lempel. 1977. A universal algorithm for sequential data compression. IEEE TRANSACTIONS ON INFORMATION THEORY, 23(3):337-343.

Proceedings of the 2nd International Conference on Historical Cryptology, HistoCrypt 2019, June 23-26, 2019, Mons, Belgium

Author:
Juan José Cabezas, Francisco Castro, Joachim von zur Gathen, Jorge Tiscornia, Alfredo Viola
Title:
Uruguayan Cryptography: Printed Book Covers
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Last updated: 2019-10-02