Mention siphash in src/ext/README

diff --git a/src/ext/README b/src/ext/README
index 58ba7f699d10508642a1981cd9c5c614c99a353b..5d5a6e1518ae32adbcdaff5fc889de9fd13abdb7 100644 (file)
--- a/src/ext/README
+++ b/src/ext/README
@@ -42,3 +42,10 @@ curve25519_donna/*.c
 
     A copy of Adam Langley's curve25519-donna mostly-portable
     implementations of curve25519.
+
+csiphash.c
+siphash.h
+
+    Marek Majkowski's implementation of siphash 2-4, a secure keyed
+    hash algorithm to avoid collision-based DoS attacks against hash
+    tables.