diff --git a/tools/protocol_signature.txt b/tools/protocol_signature.txt
new file mode 100644
index 0000000..36f7bf3
--- /dev/null
+++ b/tools/protocol_signature.txt
@@ -0,0 +1,3 @@
+Hex: 556db088fb383aed877efaa93fd2337b
+Base64: VW2wiPs4Ou2HfvqpP9Izew==
+C++ array: {0x55, 0x6d, 0xb0, 0x88, 0xfb, 0x38, 0x3a, 0xed, 0x87, 0x7e, 0xfa, 0xa9, 0x3f, 0xd2, 0x33, 0x7b}