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Overview
You can use encryption, integrity checks, and digital signatures to protect data transmitted over a network. For example, the GNU Privacy Guard encryption package lets you encrypt your e-mail messages or files you want to send, as well as letting you sign them with an encrypted digital signature authenticating that the message was sent by you. The digital signature also includes encrypted modification digest information that provides an integrity check, allowing the recipient to verify that the message received is the original and not one that has been changed or substituted.
