Through a series of levels you'll learn about common mistakes and gotchas when using Amazon Web Services (AWS). There are no SQL injection, XSS, buffer overflows, or many of the other vulnerabilities you might have seen before. As much as possible, these are AWS specific issues.
The Eudyptula Challenge was a series of programming exercises for the Linux kernel, that started from a very basic "Hello world" kernel module, moving on up in complexity to getting patches accepted into the main Linux kernel source tree.
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