2.2.1.2 EfsBlob Value
The EfsBlob entry MUST be represented in the machine-specific Registry Policy file as follows:
Key: Software\Policies\Microsoft\SystemCertificates\EFS \EfsBlob
Value: "EfsBlob" or one of the special values defined in [MS-GPREG] section 3.2.5.1.
Type: REG_BINARY.
Size: Equal to size of the Data field.
Data: Specified in the next section.
The format of the EfsBlob entry is specified in section 2.2.1.2.1.