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Disk encryption is a technology which protects information by converting it into unreadable code that cannot be deciphered easily by unauthorized people. Disk encryption uses disk encryption software or hardware to encrypt every bit of data that goes on a disk or disk volume.

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Encryption is the technique incorporated to protect the security of data. In encryption, the data which is intended to be send by the user is changed it's form using a certain key before actual transmission. Various encryption techniques are used for data encryption . After encryption,data is send to the receiver.The actual intended receiver would have the key used  for encryption. Receiver would convert the encrypted data to its original form using the key by a process called as decryption. In this way it is ensured that data remain unavailable to people other than the intended receiver.

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