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Add anchor, and clarify intended meaning of section

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Heiko Schaefer 2023-11-22 15:05:17 +01:00
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book/source/08-signing_components.md
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@ -155,12 +155,12 @@ Linking a User ID to an OpenPGP certificate
This signature is calculated over the primary key, User ID and the metadata of the signature packet.
### Adding metadata to the primary key
(primary-metadata)=
### Adding metadata to the primary key/certificate
The signatures that bind subkeys and identity components to a certificate serve two different purposes: Linking components to the certificate and adding metadata to a component.
The primary key in a certificate doesn't need to be linked to the certificate. It acts as the anchor for linking, itself and thus doesn't require being linked. However, there is nevertheless a need to associate metadata with the primary key.
The primary key in a certificate doesn't need to be linked to the certificate. It acts as the anchor for linking, itself and thus doesn't require being linked. However, there is nevertheless a need to associate metadata with the primary key, which typically applies to the certificate as a whole.
There are two mechanisms for adding metadata to the primary key: