diff --git a/README.md b/README.md
index e2bcaf7..8f368dc 100644
--- a/README.md
+++ b/README.md
@@ -84,6 +84,11 @@ Each node has node key, and for each host node stores host key. The host must be
 
 Node key is used only for node-to-node and must be kept private, unless another node is being deployed.
 
+
+# Identification
+
+Each host and each node has its own unique UUID that is used in packet addressing.
+
 ## Software architecture
 
 - Config are INI files.