DECRYPT Publications

2022

Dahlke, C. and Megyesi, B. (eds) (2022) Proceedings of the 5th International Conference on Historical Cryptology. NEALT Proceedings Series 49. HistoCrypt 2022. Published by Linköping Electronic Press. 

Fürthauer, N., Mikhalev, V., Kopal, N., Esslinger, B., Lampesberger, H., and Hermann, E. (2022) Evaluating Deep Learning Techniques for Known-Plaintext Attacks on the Complete Columnar Transposition Cipher. In the Proceedings of the 5th International Conference on Historical CryptologyHistoCrypt 2022. [https://ecp.ep.liu.se/index.php/histocrypt/article/view/399

Gambardella, M.E., Megyesi, B., and Pettersson, E. (2022) Identifying Cleartext in Historical Ciphers. In Proceedings of the Workshop on Language Technologies for Historical and Ancient Languages. LT4HALA 2022. 

Héder, M. and Megyesi, B. (2022) The DECODE Database of Historical Ciphers and Keys: Version 2. In Proceedings of the 5th International Conference on Historical Cryptology. HistoCrypt 2022. 

Jemni, S. K., Souibgui, M. A., Kessentini, Y., & Fornés, A. (2022). Enhance to Read Better: A Multi-Task Adversarial Network for Handwritten Document Image Enhancement. Pattern Recognition. [https://doi.org/10.1016/j.patcog.2021.108370

Kopal, N. and Megyesi, B. (2022) Die Kryptografen des Papstes: Entschlüsselt: Geheime Nachrichten aus dem Vatikan. Published in c't 3/22 auf Seite 134. 

Lasry, G. (2022) Cracking SIGABA in Less than 24 Hours on a Consumer PC. Cryptologia. [https://www.tandfonline.com/doi/full/10.1080/01611194.2021.1989522

Lasry, G. (2022) Analysis of a 19th Century French Cipher Created by Major Josse. Cryptologia. [https://www.tandfonline.com/doi/full/10.1080/01611194.2021.1996484

Láng, B. (2022) Colonnele Frank's Indecipherable Chiffre. In the Proceedings of the 5th International Conference on Historical CryptologyHistoCrypt 2022.

Magnifico, G., Megyesi, B., Souibgui, M.A., Chen, J., and Fornés, A. (2022) Lost in Transcription of Graphic Signs in Ciphers. In Proceedings of the 5th International Conference on Historical Cryptology. HistoCrypt 2022. 

Megyesi, B., Tudor, C., Kopal, N., Láng, B., Lehofer, A., and Waldispühl, M. (2022) What Was Encoded in Historical Cipher Keys in the Early Modern Era?. In Proceedings of the 5th International Conference on Historical Cryptology. HistoCrypt 2022. 

Megyesi, B., Tudor, C., Láng, B., Lehofer, A., Kopal, N., de Leeuw, K., and Waldispühl, M. (2022) Keys with Nomenclatures in the Early Modern Europe. Journal of Cryptologia UCRY 2113185. Taylor and Francis.

Souibgui, M. A., Bensalah, A., Chen, J., Fornés, A. & Waldispühl, M. 2022. A User Perspective on HTR Methods for the Automatic Transcription of Rare Scripts. The case of Codex Runicus. ACM Journal on Computing and Cultural Heritage. DOI: https://doi.org/10.1145/3519306

Souibgui, M. A., Biswas, S., Jemni, S. K., Kessentini, Y., Fornés, A., Lladós, J., & Pal, U. (2022). Docentr : An End-to-End Document Image Enhancement Transformer. In the Proceedings of the 26th International Conference on Pattern Recognition (ICPR2022).

Souibgui, M. A., Biten, A. F., Dey, S., Fornés, A., Kessentini, Y., Gomez, L., ... & Lladós, J. (2022). One-shot Compositional Data Generation for Low Resource Handwritten Text Recognition. In Winter Conference on Applications of Computer Vision (WACV). [https://openaccess.thecvf.com/content/WACV2022/html/Souibgui_One-Shot_Compositional_Data_Generation_for_Low_Resource_Handwritten_Text_Recognition_WACV_2022_paper.html

Souibgui, M.A., Fornés, A., Kessentini, Y., and Megyesi, B. (2022) Few Shots Are All You Need: A Progressive Learning Approach for Low Resource Handwritten Text Recognition. Journal of Pattern Recognition Letters. Elsevier. 

Waldispühl, M. Variation and Change. In Condorelli, M. & Rutkowska, H., (2022) The Cambridge Handbook of Historical Orthography. Cambridge: University Press. 

2021

Chen, J., Souibgui, M.A., Fornés, A., and Megyesi, B. (2021). Unsupervised Alphabet Matching in Historical Encrypted Manuscript Images. In Proceedings of the 4th International Conference on Historical Cryptology. HistoCrypt 2021.

Dinnissen J. and Kopal N. (2021). Island Ramanacoil a Bridge too Far. A Dutch Ciphertext from 1674. In Proceedings of the 4th International Conference on Historical CryptologyHistoCrypt 2021.

Kopal, N. and Waldispühl, M. (2021). Two Encrypted Diplomatic Letters Sent by Jan Chodkiewicz to Emperor Maximilian II in 1574-1575. In Proceedings of the 4th International Conference on Historical CryptologyHistoCrypt 2021.

Láng, B. (2021).The Rohonc code: tracing a historical riddle. 161 pages, accepted for publication by Penn State University Press: April, 2021.

Láng, B. (2021). Transfer of knowledge in the field of universal language schemes 18th-19th centuries. In Lilla Krász, ed. Science between tradition and innovation, 2021.

Láng, B. (2021)The Rohonc code: tracing a historical riddle. University Park: Penn State University Press, 2021. [https://www.psupress.org/books/titles/978-0-271-09020-7.html]

Lasry, G. (2021). Modern Cryptanalysis of Schlüsselgerät 41. In Proceedings of the 4th International Conference on Historical CryptologyHistoCrypt 2021.

Lasry, G. (2021). Deciphering a Letter from the French Ambassador in Holland to Louis XIV. In Proceedings of the 4th International Conference on Historical CryptologyHistoCrypt 2021.

Leierzopf, E., Kopal, N., Esslinger, B., Lampesberger, H. and Hermann, E. A Massive Machine-Learning Approach For Classical Cipher Type Detection Using Feature Engineering. (2021). In Proceedings of the 4th International Conference on Historical Cryptology. HistoCrypt 2021.

Megyesi, B. and Láng, B. (2021) Revealing Secrets from the Past: Studying Historical Ciphers. Abstract to Digitial History in Sweden, Dec. 9-10, 2021, Umeå University, Sweden

Megyesi, B. and Tudor, C. (2021)Transcription of Historical Ciphers and Keys. Guidelines, version 2.0. Dept. of Linguistics and Philology, Uppsala University, Sweden. [https://cl.lingfil.uu.se/~bea/publ/transcription-guidelines-v2.pdf]

Megyesi, B., Tudor, C., Láng, B, and Lehofer, A. (2021). Key Design in the Early Modern Era in Europe. In Proceedings of the 4th International Conference on Historical Cryptology. HistoCrypt 2021.

Pau Torras, Mohamed Ali Souibgui, Jialuo Chen, Alicia Fornés. (2021). A Transcription Is All You Need: Learning to Align through Attention. In Proceedings of the 14th IAPR International Workshop on Graphics Recognition (GREC), 2021. [https://link.springer.com/chapter/10.1007/978-3-030-86198-8_11]

Waldispühl, M. (2021) Variation and Change. In Condorelli, M. & Rutkowska, H., The Cambridge Handbook of Historical Orthography. Cambridge: University Press. (accepted).

2020

Bean, R., Lasry, G., and Weierud, F. (2020) Eavesdropping on the Biafra-Lisbon link – breaking historical ciphers from the Biafran war. Cryptologia [https://www.tandfonline.com/doi/full/10.1080/01611194.2020.1762261]

Bean, R., Lasry, G., and Weierud, F. (2020) We decrypted messages from the Biafran war that have remained secret for 50 years, The Conversation, July 2020 [https://theconversation.com/we-decrypted-messages-from-the-biafran-war-that-have-remained-secret-for-50-years-142417]

Chen, J., Souibgui, M. A., Fornés, A., and Megyesi, B. (2020) A Web-based Interactive Transcription Tool for Encrypted Manuscripts. In Proceedings of the 3rd International Conference on Historical Cryptology. HistoCrypt 2020. pp. 52-59. Linköping Electronic Press. 

Kopal N. (2020) Of Ciphers and Neurons – Detecting the Type of Ciphers Using Artificial Neural Networks. In Proceedings of the 3rd International Conference on Historical Cryptology. HistoCrypt 2020. pp. 77-86. Linköping Electronic Press. 

Kopal N. and Waldispühl M. (2020) Deciphering Three Diplomatic Letters Sent by Maximilian II in 1575. Cryptologia. (accepted).

Láng, B. (2020) “Was it a Sudden Shift in Professionalization? Austrian Cryptology and a Description of the Staatskanzlei Key Collection in the Haus-, Hof- und Staatsarchiv of Vienna" In: Beata, Megyesi (ed.) In Proceedings of the 3rd International Conference on Historical Cryptology HistoCrypt 2020. Linköping University Electronic Press, Linköpings universitet, (2020) p. 87.

Lasry, G. (2020) Solving a Tunny Challenge with Computerized Testery Methods. In Proceedings of the 3rd International Conference on Historical Cryptology. HistoCrypt 2020. 

Lasry, G., Megyesi, B., and Kopal, N. (2020) Deciphering Papal Ciphers from the 16th to the 18th Century. Cryptologia [https://www.tandfonline.com/doi/full/10.1080/01611194.2020.1755915].

Lasry, G., Niebel, I., and Andersson, T. (2020) Deciphering German Diplomatic and Naval Attaché Messages from 1900-1915. Cryptologia. [https://www.tandfonline.com/doi/pdf/10.1080/01611194.2020.1755914?needAccess=true]

Lehofer, A. (2020) Decrypting Historical Ciphers - A Way of Mathematical Competence Development. Opus et Educatio. [http://opuseteducatio.hu/index.php/opusHU/article/view/381/665]

Megyesi, B. (2020a) Transcription of Ciphers and Keys. In Proceedings of the 3rd International Conference on Historical Cryptology. HistoCrypt 2020. pp. 106-115. Linköping Electronic Press. [https://doi.org/10.3384/ecp2020171014]

Megyesi, B. (2020b) Transcription of Ciphers and Keys: Guidelines. Uppsala University. Sweden. [https://cl.lingfil.uu.se/~bea/publ/transcription-guidelines200221.pdf]

Megyesi, B., Esslinger, B., Fornés, A., Kopal, N., Láng, B., Lasry, G., de Leeuw, K., Pettersson, E., Wacker, A., and Waldispühl, M. (2020) Decryption of historical manuscripts: the DECRYPT project. Cryptologia. DOI: 10.1080/01611194.2020.1716410 [https://www.tandfonline.com/doi/full/10.1080/01611194.2020.1716410?scroll=top&needAccess=true]

Souibgui, M. A. and Kessentini Y. (2020) DE-GAN: A Conditional Generative Adversarial Network for Document Enhancement. IEEE Transactions on Pattern Analysis and Machine Intelligence (TPAMI) DOI: 10.1109/TPAMI.2020.3022406 [https://arxiv.org/pdf/2010.08764.pdf].

Souibgui, M. A., Kessentini, Y., and Fornés, A. (2020) A conditional GAN based approach for distorted camera captured documents recovery. In Proceedings of the 4th Mediterranean Conference on Pattern Recognition and Artificial Intelligence (MedPRAI2020) (accepted) [http://www.cvc.uab.es/people/afornes/publi/conferences/2020_MedPRAI_MSouibgui.pdf].

Souibgui, M. A., Fornés, A., Kessentini, Y., and Tudor, C. (2020) A Few-shot Learning Approach for Historical Ciphered Manuscript Recognition. In Proceedings of the 25th International Conference on Pattern Recognition (ICPR2020) (accepted) [http://www.cvc.uab.es/people/afornes/publi/conferences/2020_ICPR_MSouibgui.pdf].

Tudor, C, Megyesi, B, and Láng, B. (2020) Automatic Key Structure Extraction. In Proceedings of the 3rd International Conference on Historical Cryptology. HistoCrypt 2020. pp. 146-152. Linköping Electronic Press. 

2019

Baró A., Chen, J., Fornés, A., and Megyesi, B. (2019) Towards a Generic Unsupervised Method for Transcription of Encoded Manuscripts. In Proceedings of the 3rd International Conference on Digital Access to Textual Cultural Heritage (DATeCH2019), May 2019 Brussels, Belgium. https://cl.lingfil.uu.se/~bea/publ/datech19.pdf

Kopal, N. (2019) Cryptanalysis of Homophonic Substitution Ciphers Using Simulated Annealing with Fixed Temperature. In Proceedings of the 2nd International Conference on Historical Cryptology, HistoCrypt 2019, June 23-25, 2019, Mons, Belgium. NEALT Proceedings Series 37, Linköping Electronic Press. [http://www.ep.liu.se/ecp/158/012/ecp19158012.pdf]

Láng, B. (2019) Dead ends in breaking an unknown cipher: experiences in the historiography of the Rohonc Codex Proceedings of the 2nd International Conference on Historical Cryptology, HistoCrypt 2019, June 23-26, 2019, Mons, Belgium, Belgium. NEALT Proceedings Series 37, Linköping Electronic Press. [https://ep.liu.se/ecp/158/006/ecp19158006.pdf]

Lasry, G. (2019) A Practical Meet-in-the-Middle Attack on SIGABA, Proceedings of the 2nd International Conference on Historical Cryptology, HistoCrypt 2019, June 23-26, 2019, Mons, Belgium, Belgium. NEALT Proceedings Series 37, Linköping Electronic Press. [https://ep.liu.se/ecp/158/005/ecp19158005.pdf]

Lasry, G. (2019) Solving a 40-Letter Playfair Challenge with CrypTool 2, Proceedings of the 2nd International Conference on Historical Cryptology, HistoCrypt 2019, June 23-26, 2019, Mons, Belgium. NEALT Proceedings Series 37, Linköping Electronic Press. [https://ep.liu.se/ecp/158/010/ecp19158010.pdf]

Lasry, G., Nils Kopal, and Arno Wacker. (2019) "Cryptanalysis of Enigma double indicators with hill climbing." Cryptologia 43.4: 267-292. [https://www.tandfonline.com/doi/abs/10.1080/01611194.2018.1551253]

Megyesi, B., Blomqvist, N., and Pettersson, E. (2019) The DECODE Database: Collection of Historical Ciphers and Keys. In Proceedings of the 2nd International Conference on Historical Cryptology. HistoCrypt 2019, June 23-25, 2019, Mons, Belgium. NEALT Proceedings Series 37, Linköping Electronic Press. [https://cl.lingfil.uu.se/~bea/publ/decode-histocrypt-2019.pdf]

Pettersson, E. and Megyesi, B. (2019) Matching Keys and Encrypted Manuscripts. In Proceedings of 22nd Nordic Conference on Computational Linguistics, Nodalida 2019. [https://cl.lingfil.uu.se/~bea/publ/keys-nodalida19.pdf]

Thesis

Filip Fornmark (2022) Models, Keys and Cryptanalysis - Evaluating historical statistical language models in cryptanalysis of homophonic substitution ciphers. Bachelor's thesis in Linguistics, Gothenburg University, Sweden.

Nikolina Milioni (2022) Evaluating Transcription of Ciphers with Few-Shot Learning. Master’s thesis in Language Technology, Uppsala University. Sweden.

Giacomo Magnifico (2021) Lost in Transcription: Evaluating Clustering and Few-Shot Learning for Transcription of Historical Ciphers. Master’s thesis in Language Technology, Uppsala University. Sweden. http://www.diva-portal.org/smash/record.jsf?pid=diva2%3A1616686&dswid=-107

Gambardella, Maria-Elena (2021) Cleartext Detection and Language Identification in Ciphers. Master’s thesis in Language Technology, Uppsala University. Sweden. https://www.diva-portal.org/smash/record.jsf?pid=diva2%3A1569329&dswid=4925 

Weimann, Niklas (2021) Implementierung und Visualisierung verschiedener kryptografischer Handverfahren und Codes in CrypTool 2 (Engl Title: Implementation and Visualization of different cryptographic hand ciphers and codes in CrypTool 2". Bachelor's thesis in computer science. University of Siegen, Germany, [https://www.cryptool.org/assets/ctp/documents/BA_Weimann.pdf]

Addad, Sally (2020) Implementation and Visualization of Steganography Procedures in CrypTool 2. Bachelor's thesis in business informatics. University of Mannheim, [https://www.cryptool.org/assets/ctp/documents/BA_Addad.pdf]

Han, Renfei (2020) Using Attention-based Sequence-to-Sequence Neural Networks for Transcription of Historical Cipher Documents. Master’s thesis in Language Technology, Uppsala University, Sweden. [http://www.diva-portal.org/smash/record.jsf?pid=diva2%3A1470446&dswid=4822]

Johansson, Kajsa (2019) Transcription of Historical Encrypted Manuscripts: Evaluation of an Automatic Interactive Transcription Tool. Bachelor thesis in Language Technology, Uppsala University, Sweden. [http://uu.diva-portal.org/smash/get/diva2:1323635/FULLTEXT01.pdf]

Tudor, Crina (2019) Studies of Cipher Keys from the 16th Century: Transcription, Systematisation and Analysis. Master thesis in Language Technology, Uppsala University, Sweden. [http://uu.diva-portal.org/smash/get/diva2:1369404/FULLTEXT01.pdf]

This work is supported by the Swedish Research Council, grant 2018-06074: DECRYPT - Decryption of historical manuscripts.