encryption - 练习密码分析和密码学技术的工具

Question

我正在寻找工具(最好是免费的)来练习各种密码分析和密码学技术。类似于以下两个在线工具，但具有更多技术。

http://www.cryptool-online.org/index.php?option=com_content&view=article&id=55&Itemid=53&lang=en

http://www.simonsingh.net/The_Black_Chamber/letterfrequencies.html

任何建议将非常受欢迎。

谢谢，
安比。

Answer 1

Matasano Crypto Challenges是密码学的极好学习资源。

We've built a collection of 48 exercises that demonstrate attacks on real-world crypto.

This is a different way to learn about crypto than taking a class or reading a book. We give you problems to solve. They're derived from weaknesses in real-world systems and modern cryptographic constructions. We give you enough info to learn about the underlying crypto concepts yourself. When you're finished, you'll not only have learned a good deal about how cryptosystems are built, but you'll also understand how they're attacked.

对于熟悉密码学的人来说，前几组似乎有点太容易了，但挑战很快变得更加棘手和高级。