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Slightly more structure for "highlevel"

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Heiko Schaefer 2023-09-15 14:11:57 +02:00
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book/source/03-highlevel.md
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# A high-level view
```
- ?
- Introduce Packet/Subpacket concepts (?)
```
## A very brief history
The OpenPGP standard has evolved over time.
@ -75,3 +70,23 @@ compared to the previous version 4.
As of this writing (in 2023), version 4 of OpenPGP is still most commonly used.
OpenPGP version 4 is described in [RFC 4880](https://datatracker.ietf.org/doc/html/rfc4880).
## Concepts
### Certificates/Keys
All uses of OpenPGP are centered around (asymmetric) cryptographic key material.
In OpenPGP, cryptographic keys are combined with additional metadata into
"OpenPGP Keys", or "OpenPGP Certificates".
See chapter "certs" (link) for more on OpenPGP Certificates, and "private" for handling of
private key material in OpenPGP.
### Cryptographic operations
- Signatures
- Encryption
### Internal structure of OpenPGP data
OpenPGP data is structured as "packets" (and sometimes "subpackets"), internally.