According to a patent Sony filed for in September 2012 uncovered on a thread on NeoGAF, the company wants to introduce a technology that would tag a game with a user’s account or machine and would be able to tell if that game has been used before.
“As a technique to suppress the second-hand sales and purchase, a user may be first required to send a password or the like to a remote authentication server from a reproduction device (game player) via the Internet and the reproduction of content may be permitted only for the device that has succeeded in authentication.”
We know game manufacturers have been trying to deal with used game sales on their own by rewarding gamers who purchase a new version of their game with in-game bonuses or content, but this is the first time we’ve seen a hardware manufacturer take steps towards battling the used game market themselves. Seeing how the next PlayStation is still a few years away from even being mentioned, we’ll take this news with a grain of salt and hope it doesn’t end up being implemented in an upcoming PlayStation console.