ICAO air-ground security standards strategy

Summary for Secure Dialogue Service Approach The original Doc 9705 Edition 3 approach to ATN Security is a validated standard. It has the disadvantage that its implementation in the ULCS introduces significant complexity to the ULCS and requires that the complete ULCS be replaced. The proposed Secure Dialogue Service approach would simplify the implementation of ATN Security • Security is all performed in the same place, i.e., in the Secure Dialogue Service sub-layer The Doc 9880 ULCS (Draft Version 2) has been updated to remove the security features. This version is equivalent to Doc 9705 Edition 2 but with PDRs incorporated The Secure Dialogue Service provides implementation options: ➢ It can not be implemented or implemented and used or not depending or the operational domain ➢ In any case the applications and ULCS would be the same The Secure Dialogue Service has the added advantage that it can be used in the ATN/IPS stack.