I'm trying to figure out how these FIFA online sticker codes have been generated: Warning Ads! Disable JavaScript.
http://fifapaninicode7.appspot.com/
I was trying to figure out how they cracked it. Was harder than I thought. Thought I'd ask the brains on HN! :-)
And here's some code I was mucking around with:
https://dotnetfiddle.net/lSHie4
A couple of things caught my interest so far as possibles:
http://en.wikipedia.org/wiki/International_Securities_Identi...
What is this from?
Some game codes actually consists of a memory address and data to write into that address so you wouldn't expect there to be a simple sequence.