1 files changed, 5 insertions, 0 deletions
diff --git a/testsuite/sha3.awk b/testsuite/sha3.awk
index f7efa609..9031c59d 100755
--- a/testsuite/sha3.awk
+++ b/testsuite/sha3.awk
@@ -1,5 +1,10 @@
 #! /usr/bin/awk -f
 
+# This script is used to process the Keccak testvectors, originally
+# we used http://keccak.noekeon.org/KeccakKAT-3.zip.
+# For the updated NIST version, test vectors can be found at
+# https://github.com/gvanas/KeccakCodePackage/tree/master/TestVectors
+
 /^Len/ { len = $3 }
 /^Msg/ { msg = $3 }
 /^MD/ { md = $3;