Add upgrade notes

simplesamlphp · Apr 5, 2022 · 01692b0 · 01692b0
1 parent 84dc61e
commit 01692b0
Showing 1 changed file with 9 additions and 0 deletions.
diff --git a/UPGRADING.md b/UPGRADING.md
@@ -0,0 +1,9 @@
+# Upgrade notes
+
+## 1.x to 2.0
+
+### Hash generation BC breaking change
+
+The algorithm to calculate the hash for the pairwise-id has changed,
+because it contained a security weakness. This means new hashes
+will be generated for each user.