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Definition: PGP (Pretty Good Privacy)
Many business houses use internet based services like email for its communication and other requirements. Since most of the information is confidential in nature it requires lot of data protection while transmission. One of such programs which are used to encrypt and decrypt email over internet is PGP (Pretty Good Privacy).
Sender sends it message by encrypting it with a digital signature at the sending end. This message once received is verified to check whether it is not tempered on the way.
It is encrypted using widely available public key before sending or storing. This becomes unreadable to unauthorized intruder which would require a private key for decrypting it. Thus only authorized person will be able to access such files.
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