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README.md

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-# c-its-itss
-C-ITS ITS-S reference implementation focused on a security meant for testing and studying of  TeskaLabs SeaCat CA C-ITS API
+# C-ITS ITS-S Reference implementation
+
+This is a reference implementation of the ITS-S (a client side) as defined in ETSI C-ITS standards.
+Its main purpose is to enable implementators of the ITS-S software to study and validate their security implementation.
+It also contains a simple [ITS-G5](https://en.wikipedia.org/wiki/IEEE_802.11p) network simulator that utilizes UDP IPv4 multicast.
+
+Cooperative Intelligent Transport Systems (C-ITS) allow road users and traffic managers to share information and use it to coordinate their actions.
+It is a set of standards that describes data exchange between high-speed vehicles and between the vehicles and the roadside infrastructure, so called V2X communication.
+
+
+## C-ITS standards
+
+  * ETSI TS 102 941 v1.1.1
+  * ETSI TS 103 097 v1.2.1
+
+