Sony have released a compulsory patch for older versions of the Japanese PSP, closing a security flaw that allowed the running of unofficial software - i.e. any software not digitally signed by Sony itself.The difference after the patch is applied won't be noticable by the majority of PSP owners, but it will help to prevent hackers from figuring out how to run illegal copies of PSP games that have appeared on the Internet:
Basically, [the flaw] leaves the PSP wide open to run bootlegs and possibly pirated games. An emulator for running Game Boy and Game Boy Color games on PSP has already been converted to run on unprotected PSP hardware, and while coders have so far not been able to figure out how to run stolen PSP games, the encryption flaw could be used to run the illegal rips of PSP games already posted on international pirate sites.
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