Abstract

The Štolba cipher machine was the first Czechoslovak cipher machine used in the army after the mid-1930s, and later in Slovakia during WW2. It had a unique design based on pneumatic transmission and complex stepping rules. We present basic facts about the Štolba machine from documents found in Czech and Slovak archives. Although the machine description was incomplete (and in some cases not accurate), we have been able to reconstruct (a highly probable) encryption algorithm, and develop a method to reconstruct (message) key from a known PC pair. Part of the machine configuration, however, still remains unknown due to the large space of possible settings and the complexity of the algorithm.

摘要

Štolba 密码机是 1930 年代中期后第一台在军队中使用的捷克斯洛伐克密码机，后来在二战期间在斯洛伐克使用。它具有基于气动传动和复杂步进规则的独特设计。我们根据在捷克和斯洛伐克档案中找到的文件介绍有关 Štolba 机器的基本事实。虽然机器描述不完整（在某些情况下不准确），但我们已经能够重建（一个极有可能的）加密算法，并开发了一种从已知 PC 对重建（消息）密钥的方法。然而，由于可能设置的空间很大和算法的复杂性，部分机器配置仍然未知。