SBL
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The SBL (that might stand for Secure Block) is a kernel device that handles security and cryptography. This kernel device checks PUP files, SELF and PRX executables, NPDRM packages and Debug packages (the last 3 are handled by the Auth Manager Secure Module). It also has a system interface for Playstation File System keys and an interface for the ZLIB hardware system (/dev/sce_zlib).
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