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2.2.1.1 Recovery Agent Certificate

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A separate registry key MUST be created for each EFS recovery agent under the path Software\Policies\Microsoft\SystemCertificates\EFS\Certificates. The name of this key MUST be the 40-character string corresponding to the hexadecimal representation of the SHA-1 hash of the certificate (this quantity is sometimes referred to as the certificate "thumbprint"). This key MUST contain a single value of type REG_BINARY. The name of this value MUST be "Blob". The format of this value (hereafter referred to as the certificate binary large object (BLOB)) is described in the following sections.