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Add diagram for SEIPDv2

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Paul Schaub 2023-11-27 23:39:26 +01:00 • committed by Heiko Schaefer
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book/source/10-encryption.md
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@ -76,6 +76,13 @@ The [version 2 SEIPD](https://www.ietf.org/archive/id/draft-ietf-openpgp-crypto-
In version 2 SEIPD, the *session key* is transformed into a *message key*, based on a salt value in the v2 SEIPD packet.
```{figure} drawio/SEIPDv2-PKESK.png
:name: fig-encryption-seipdv2-pkesk
:alt: TODO
With SEIPDv2, the message-key is derived from the session-key in an extra step.
```
### v1 SEIPD, based on MDC
The [version 1 SEIPD](https://www.ietf.org/archive/id/draft-ietf-openpgp-crypto-refresh-12.html#version-one-seipd) mechanism is supported by all modern OpenPGP version 4 implementations. It was introduced in [RFC 4880](https://www.rfc-editor.org/rfc/rfc4880.html#section-5.13).