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Heiko Schaefer 2023-12-12 13:02:55 +01:00
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@ -3,7 +3,6 @@ SPDX-FileCopyrightText: 2023 The "Notes on OpenPGP" project
SPDX-License-Identifier: CC-BY-SA-4.0
-->
(encryption_chapter)=
# Encryption
[Encryption](https://www.ietf.org/archive/id/draft-ietf-openpgp-crypto-refresh-12.html#name-confidentiality-via-encrypt) is one of the core facilities of OpenPGP. It provides confidentiality.
@ -48,7 +47,7 @@ Two generations of encryption mechanisms are currently relevant in OpenPGP, and
The main difference between these lies in the symmetric part of the encryption mechanism, represented by versions 1 and 2 of the *Symmetrically Encrypted and Integrity Protected Data* packets (abbreviated as "SEIPD"). The two versions use different mechanisms to provide non-malleability. More on these below.
Older, legacy encryption mechanisms exist in OpenPGP. However, those must not be used for encryption anymore. Messages encrypted using these legacy mechanisms may still be decrypted, although with caution. For more information, see the [decryption](decryption_chapter) chapter.
Older, legacy encryption mechanisms exist in OpenPGP. However, those must not be used for encryption anymore. Messages encrypted using these legacy mechanisms may still be decrypted, although with caution. For more information, see the [decryption](/decryption) chapter.
SEIPD packets are used in combination with two mechanisms that store *session keys*: