Who encrypted it or who has been granted access

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Reference no: EM133712642

EFS File Encryption

The Encrypting File System or EFS Encryption is one of the components of the NTFS file system. It is available on a high range of Windows operating systems.

It is supported on Windows 11, Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista, Windows XP, Windows 2000, and Windows Server editions.

The key used for these kinds of symmetric encryption is called as File Encryption Key (or FEK). This FEK is in return encrypted with a public or a private key algorithm like RSA and stored with the file. Encryption

The first step involves the file itself. Using the Symmetric Key (FEK) the file is encrypted. This is just one aspect of the total encryption.

Now the Symmetric Key (FEK) is encrypted with a public key for the user, and the Encrypted FEK is stored in the Encrypted file's header. As simple as that.

Decryption
First of all, the Encrypted FEK from the Encrypted File's Header is fetched and decrypted using the Public Key.

DEMO
For this demo, we will use the windows system with 2 user account.

Objective: The file and folder encrypted with the EFS should only be available to the user who encrypted it or who has been granted access.

Reference no: EM133712642

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