Zhongguancun Laboratory Zhongguancun Laboratory Tsinghua University Zhongguancun Laboratory This document defines a "Signed SAVNET-Peering Information" (SiSPI) object, a Cryptographic Message Syntax (CMS) protected content type included in the Resource Public Key Infrastructure (RPKI). A SiSPI object is a digitally signed object that carries an attestation for a single Autonomous System (AS) participating in inter-domain SAVNET. A valid SiSPI object confirms that the holder of the listed AS number has published the attestation indicating its participation in inter- domain SAVNET and its willingness to establish SAVNET peering relationships.