CIPA e-Delivery is an activity of the Directorate-General for Informatics (DIGIT) of the European Commission.

The objective of CIPA is to provide a generic solution for public administrations to exchange documents in a secure and reliable way. CIPA e-Delivery aims at creating a document exchange network. Participants have access to this network through gateways, which communicate with each other using a standard protocol. 

ENTSOG (the European Network of Transmission System Operators for Gas) has published the material presented at its second AS4 Communication Protocol Workshop.  The workshop was an interactive workshop for stakeholders to discuss implementation issues and experiences.

In the introduction, the implementation of AS4 following Commission Regulation (EU) 2015/703 was presented, an overview was given of the first ENTSOG AS4 Interoperability Proof-of-Concept (in 2014) and the updates in 2015 on the ENTSOG Usage Profile were presented.