CryptoToolJ Download Page

What is CryptoToolJ?

CryptoToolJ: An Extensible Cryptology Tool for Historical Ciphers

Abstract. This paper describes CryptoToolJ (Cryptology Tool -- Java), an extensible Java-based software program for implementing and analyzing historical ciphers. CryptoToolJ is designed to support computer-based research and teaching in historical cryptography. It contains default im- plementations of a number of historical cipher engines. It also incorporates several easy-to-use cryptanalysis programs, thus providing an integrated software platform for historical cryptologists. What distinguishes Crypto- ToolJ from similar tools is its generality and extensibility. Because of its open, object-oriented design, new cipher engines and programmer-defined analyzers can be easily incorporated into the program. The software, in- cluding source code and documentation, is available for free download. It is hoped that as others utilize this tool, they will contribute to its further development.

CryptoToolJ v1.3

The current version has undergone several iterations. The following people have contributed to its design and implementation:

Installing CryptoToolJ on Unix, Linux, or Windows Machine