Sony has recently patented a technology that has the ability to block used games from being used on multiple systems. The technology places a tag on used games which can be used to try and control the second hand market. There were already rumors that the next Sony console will prevent users from playing used games. However, Jack Tretton CEO of Sony Computer Entertainment of America, said he would be against the idea of blocking used software. Despite the assurances of Sony’s top executives, moves like these are hard to ignore and it is looking like playing used games on Sony products is a thing of the past.