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PS4 license agreement.

You may not lease, rent, sublicense, publish, modify, patch, adapt or translate System Software. You may not reverse engineer, decompile or disassemble System Software, create System Software derivative works, or attempt to create System Software source code from its object code. You may not (i) use any unauthorized, illegal, counterfeit or modified hardware or software with System Software; (ii) use tools to bypass, disable or circumvent any PS4 system encryption, security or authentication mechanism;