This is a series consisting of Part 1, Part 2.

XORing the shellcode

Until now, we didn't obfuscate the bytes of our shellcode at all. The first, and very easy approach we want to try now is XORing it with a constant, hardcoded value, let's say 0x41 or 'A'. To …

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Amazon Glacier uses its own hash format which is called "SHA256 Tree Hash". The documentation of this hash format can be found http://docs.aws.amazon.com/amazonglacier/latest/dev/checksum-calculations.html.

I do not seem to be the only one who searched for an easy-to-use command-line tool. As I …

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Some time ago, I implemented Langton's Ant in C. Langton's Ant is not more than a very simple Turing machine. However, even with those simple rules, its behaviour is not easy to predict.

I've read about Langton's Ant in an article of Spektrum der Wissenschaft (German) years ago and on …

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