Changes

The National Institute for IT Security (BSI) emphasizes two alternative AS4 compatible approaches: PKI encrypted payloads with electronic signatures and transport based (TLS 1.2) encryption. It is not clear from the [https://www.bsi.bund.de/DE/Themen/Unternehmen-und-Organisationen/Standards-und-Zertifizierung/Technische-Richtlinien/TR-nach-Thema-sortiert/tr02102/tr02102_node.html requirements specification] which one should be used when. But the initial thinking probably was to go for the payload encryption in the first place and to fall back to TLS, when the procedures implemented proved technically unreliable ot too complicated for the market participants. As this is currently under implementation by a multitude of software vendors for energy market communication products at the point of this writing (March/2024), no statement can be made on the initial success and use of payload encryption.