Article | Proceedings of the 1st International Conference on Historical Cryptology HistoCrypt 2018 | The Application of Hierarchical Clustering to Homophonic Ciphers Linköping University Electronic Press Conference Proceedings
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Title:
The Application of Hierarchical Clustering to Homophonic Ciphers
Author:
Anna Lehofer: Department of Philosophy and History of Science, Budapest University of Technology and Economics, Budapest H-1111, Hungary
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Full text (pdf)
Year:
2018
Conference:
Proceedings of the 1st International Conference on Historical Cryptology HistoCrypt 2018
Issue:
149
Article no.:
024
Pages:
133-136
No. of pages:
4
Publication type:
Abstract and Fulltext
Published:
2018-06-13
ISBN:
978-91-7685-252-1
Series:
Linköping Electronic Conference Proceedings
ISSN (print):
1650-3686
ISSN (online):
1650-3740
Publisher:
Linköping University Electronic Press, Linköpings universitet


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In this work in progress study I examined whether the method of hierarchical clustering could be used efficiently on Hungarian homophonic ciphers from the early modern age. First I have tested the methodology on artificial homophonic ciphers. The original corpora of these artificial codes were appropriate to ascertain the effectiveness of the method: knowing the plaintext I could control the outcome. In connection with text length I have identified the limits of the applicability of hierarchical clustering. In a second part, the investigation of eight original letters from the early modern age followed. The testing of original manuscripts shows whether the results based on the artificial ciphers are applicable to original historical documents as well.

Proceedings of the 1st International Conference on Historical Cryptology HistoCrypt 2018

Author:
Anna Lehofer
Title:
The Application of Hierarchical Clustering to Homophonic Ciphers
References:

Benedek Láng. 2015. Titkosírás a Kora Újkori Magyarországon. Balassi Kiadó, Budapest.

Elliot Fischer. 1979. Language Redundancy and Cryptanalysis. In Cryptologia, volume 3, pages 233-235.

James Reeds. 1977. Entropy Calculations and Particular Methods of Cryptanalysis. In Cryptologia, volume 1, pages 235-254.

Kevin Knight, Beáta Megyesi, Christiane Schaefer. 2011. The Copiale Cipher. Presented at the ACL Workshop on Building and Using Comparable Corpora.

Vipin Kumar, Michael Steinbach, Pang-Ning Tan. 2005. Introduction to Data Mining. Pearson (Education Inc.), Boston.

Proceedings of the 1st International Conference on Historical Cryptology HistoCrypt 2018

Author:
Anna Lehofer
Title:
The Application of Hierarchical Clustering to Homophonic Ciphers
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Last updated: 2019-11-06