Data Encryption on Disk
Perhaps the most common data encryption scheme used for data stored on disk is the DES (Data Encryption Standard). In this type of encoding, both parties must have encryption keys to perform a successful lock and unlock.
If a user tries to access an encrypted file and doesnt have the right password (or key), the worst that will happen is that they will receive a scrambled, unintelligible version of the file.
File systems of many NOSs, like Windows 2000, support storage of data in encrypted form.
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