Based on concept and code found here: http://news.ycombinator.com/item?id=2959219 https://lock.cmpxchg8b.com/shatter/visualize.html?best=1 Original concept and code: Tavis Ormandy <taviso@cmpxchg8b.com> HTML/visualization improvements: Peter Waller <peter.waller@gmail.com> sha1_process_message originally based on: http://www.webtoolkit.info/javascript-sha1.html