Terms you'll need to understand:
Encrypting File System (EFS)
Digital certificates
Certificate Authority (CA)
Enterprise Certificate Authority
Standalone Certificate Authority
Certificate Revocation List (CRL)
Techniques you'll need to master:
Understanding the requirements for the different CA types
Installing Certificate Services
Configuring a Certificate Authority
Understanding the certificate enrollment process
Understanding the different methods of requesting certificates
Revoking certificates
Removing the Encrypting File System keys