The next European Historical Ciphers Colloquium (Euro HCC) will be held on 18 to 19 May 2017 at the Castle Smolenice near Bratislava, Slovakia. Euro HCC is aiming to be the premier annual European event about the history of cryptology.

We encourage everybody interested in classical cryptography and cryptanalysis to submit either an abstract (at most 2 pages) for a presentation or a paper (at most 10 pages), which will be evaluated by the organizing committee. The conference's subjects include, but are not limited to:

- the use of cryptography in military, diplomacy, business, and other areas
- analysis of historical ciphers with the help of modern computerized methods
- the influence of cryptography on the course of history
- the Enigma and other encryption machines
- unsolved historical cryptograms
- the Voynich manuscript and Rohonczi kodex
- the history of modern (computer-based) cryptography
- teaching and promoting cryptology in schools, universities, and the public

Submissions must carry the names of authors (not anonymous). The final version of accepted submissions will be printed in a proceedings volume to be distributed at the conference. The conference language is English. Submissions must be pdf files prepared with LaTeX. For the printed proceedings, also the LaTeX source code is required. Participation in the conference is mandatory for at least one author of each paper. The length of a presentation is expected to be 30 minutes (including Q&A). Submissions from those who are new to the field, particularly students, are very welcome. There will be a participation fee for speakers and attendants. The amount has not yet been set and will be announced in due course on the conference website.