Towards a Flexible Intra-Trustcenter Management Protocol
  This paper proposes the Intra Trustcenter Protocol (ITP), a flexible and secure management protocol for communication between arbitrary trustcenter components. Unlike other existing protocols (like PKCS#7, CMP or XKMS) ITP focuses on the communication within a trustcenter. It is powerful enough for transferring complex messages which are machine and human readable and easy to understand. In addition it includes an extension mechanism to be prepared for future developments. 
V. Karatsiolis, M. Lippert, A. Wiesmaier, A. Pitaev, M. Ruppert, J.   Buchmann