As Marc Canel of EETimes points out the 1st revision of the Open Trust Protocol is out. Open Trust Procotol is an IETF submission by multiple vendors, the companies Symantec, Intercede, Solacia, and ARM Ltd are the employers of the editors of the I-D.
Abstract: This document specifies the Open Trust Protocol (OTrP), a protocol to install, update, and delete applications and to manage security configuration in a Trusted Execution Environment (TEE). TEEs are used in environments where security services should be isolated from a regular operating system (often called rich OS). This form of compartmentlization grants a smaller codebase access to security sensitive services and restricts communication from the rich OS to those security services via mediated access.