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link to cryptographic hashes

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Heiko Schaefer 2023-11-21 10:31:41 +01:00
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book/source/03-cryptography.md
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@ -6,6 +6,7 @@ SPDX-License-Identifier: CC-BY-SA-4.0
(cryptography_chapter)= (cryptography_chapter)=
# Cryptographic concepts and terms # Cryptographic concepts and terms
(crypto-hash)=
## Cryptographic hash functions ## Cryptographic hash functions
[Cryptographic hash functions](https://en.wikipedia.org/wiki/Cryptographic_hash_function) take data strings of any length (like a text message or file) and output a fixed-size code, a "hash digest," which is often abbreviated as either "digest" or "hash." A hash digest acts like a unique identifier for the original data. [Cryptographic hash functions](https://en.wikipedia.org/wiki/Cryptographic_hash_function) take data strings of any length (like a text message or file) and output a fixed-size code, a "hash digest," which is often abbreviated as either "digest" or "hash." A hash digest acts like a unique identifier for the original data.

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book/source/04-certificates.md
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@ -78,7 +78,7 @@ Each OpenPGP component key possesses an *OpenPGP fingerprint*. This fingerprint
:name: fig-fingerprint :name: fig-fingerprint
:alt: Depicts a box with white background and the title "Fingerprint of an OpenPGP component key". Inside, another box with a green frame, the title "Component Key", the text "key creation time" on the lower left and a the green public key symbol on the lower right is shown. Below the component key box a fingerprint in a box with a light-yellow background and a yellow dotted line is depicted. The word "Fingerprint" is shown left of the box with the fingerprint and both are connected with a yellow dotted line. :alt: Depicts a box with white background and the title "Fingerprint of an OpenPGP component key". Inside, another box with a green frame, the title "Component Key", the text "key creation time" on the lower left and a the green public key symbol on the lower right is shown. Below the component key box a fingerprint in a box with a light-yellow background and a yellow dotted line is depicted. The word "Fingerprint" is shown left of the box with the fingerprint and both are connected with a yellow dotted line.
Every OpenPGP component key is identifiable by a fingerprint. Although it's technically possible for different keys to share a fingerprint, cryptographic mechanisms make it exceedingly difficult, if not practically impossible with current technology, to find keys that share a fingerprint. Every OpenPGP component key is identifiable by a fingerprint. Although it's technically possible for different keys to share a fingerprint, [cryptographic mechanisms](crypto-hash) make it exceedingly difficult, if not practically impossible with current technology, to find keys that share a fingerprint.
``` ```
The fingerprint of our example OpenPGP component key is `C0A5 8384 A438 E5A1 4F73 7124 26A4 D45D BAEE F4A3 9E6B 30B0 9D55 13F9 78AC CA94`[^keyid]. The fingerprint of our example OpenPGP component key is `C0A5 8384 A438 E5A1 4F73 7124 26A4 D45D BAEE F4A3 9E6B 30B0 9D55 13F9 78AC CA94`[^keyid].