Question Explain EFS encryption key and BitLocker Drive Encryption
Question Explain EFS encryption key and BitLocker Drive Encryption
EFS operates by encrypting a file, by utilizing the File Encryption Key, or FEK, which is a bulk symmetric key. It uses a symmetric encryption technique since the encryption and decryption of large volumes of data requires long time than when an asymmetric key encryption is used.
EFS, that utilizes a completely random file encryption key (FEK) to provide encryption of data ( e.g. local NTFS files), is influenced by public key cryptography. A key pair is used by a public key-based system: one private and one public. The private key is only accessible to the user who possesses the private key.
To help secure files and folders on almost any disk on a per-user basis, EFS is used.
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