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 …

Read more...

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 …

Read more...