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Email

(Electronic Mail) - Messages, usually text, sent from one person to another via computer. E-mail can also be sent automatically to a large number of addresses (Mailing List).

Encryption

Processing and changing data so that only the intended recipient can read it. The recipient of the encrypted data must have the proper decryption key and program to decipher the data.

Extranet

A part of the company's network that is made accessible for some group of people. Sometimes protected by a password or some other kind of authentication. It allows users to access some of the non-public data, eg. a person's credit card balance.