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i think the rfc says that generic certifications are commonly used for third party certifications, while this section is about self-signatures

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Heiko Schaefer 2023-11-28 20:06:24 +01:00
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book/source/08-signing_components.md
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@ -137,7 +137,7 @@ Self-signatures also play a vital role in binding identity components, such as U
To bind the User ID `Alice Adams <alice@example.org>` to her OpenPGP certificate (`AAA1 8CBB 2546 85C5 8358 3205 63FD 37B6 7F33 00F9 FB0E C457 378C D29F 1026 98B3`), Alice would use a certification signature.
There are four types of *certifying self-signature*. According to the specification, the most commonly used type for binding User IDs is the [generic certification](https://www.ietf.org/archive/id/draft-ietf-openpgp-crypto-refresh-12.html#name-generic-certification-of-a-) (type ID `0x10`). Alternatively, types `0x11`, `0x12` or `0x13` might be used. This binding signature must be issued by the primary key.
There are four types of *certifying self-signature*. The most commonly used type for binding User IDs is the [positive certification](https://www.ietf.org/archive/id/draft-ietf-openpgp-crypto-refresh-10.html#sigtype-positive-cert) (type ID `0x13`). Alternatively, types `0x10`, `0x11` or `0x12` might be used. This binding signature must be issued by the primary key.
The certifying self-signature packet – calculated over the primary key, User ID, and metadata of the signature packet – is added to the certificate, directly following the User ID packet.