AMD Platform Security Processor

The AMD Platform Security Processor (PSP), officially known as AMD Secure Technology, is a trusted execution environment subsystem incorporated since about 2013 into AMD microprocessors. According to an AMD developer's guide, the subsystem is "responsible for creating, monitoring and maintaining the security environment" and "its functions include managing the boot process, initializing various security related mechanisms, and monitoring the system for any suspicious activity or events and implementing an appropriate response". Critics worry it can be used as a backdoor and is a security concern. AMD has denied requests to open source the code that runs on the PSP.

The AMD PSP is the cryptoprocessor in charge of executing the PlayStation 5 boot ROM and handling crypto operations and secure key rings. It likely also executes the Secure Modules. It has a similar role to the SAMU processor on PlayStation 4, the CMeP processor on PS Vita and the Kirk processor on PlayStation Portable.