A group of Chinese hackers has succeeded in cracking Apple’s algorithm for encoding iTunes Store Gift Certificates, and are creating discounted certificates using a key generator. Outdustry reports that a number of the codes are available on the site Taobao, with $200 cards selling for as little as $2.60. The owner of the Taobao shop offering the cards admitted that the codes are created using key generators, and that he paid to use the hackers’…