From b2244aeca15535356df1226a5eda4ca9d8fbd37e Mon Sep 17 00:00:00 2001
From: Heiko Schaefer <heiko@schaefer.name>
Date: Fri, 8 Dec 2023 23:07:47 +0100
Subject: [PATCH] add link anchor

---
 book/source/04-certificates.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/book/source/04-certificates.md b/book/source/04-certificates.md
index 256fda0..1af95c3 100644
--- a/book/source/04-certificates.md
+++ b/book/source/04-certificates.md
@@ -233,6 +233,7 @@ Notably, in many algorithms, encryption and signing-related functionalities (i.e
 
 [^key-flag-sharing]: With ECC algorithms, it's impossible to combine {term}`encryption<Encryption Key Flag>` functions with those intended for {term}`signing<Signing Key Flag>`. For example,  ed25519 is specifically used for {term}`signing<Signing Key Flag>`; cv25519 is designated for {term}`encryption<Encryption Key Flag>`.
 
+(algo-pref)=
 ### Algorithm preferences and feature signaling
 
 OpenPGP incorporates significant ["cryptographic agility"](https://en.wikipedia.org/wiki/Cryptographic_agility). It doesn't rely on a single fixed set of algorithms. Instead, it defines a suite of cryptographic primitives from which users (or their applications) can choose.