The IESG has approved the following document: - 'The Multicast Security Architecture ' <draft-ietf-msec-arch-05.txt> as an Informational RFC This document is the product of the Multicast Security Working Group. The IESG contact persons are Russ Housley and Steve Bellovin. Technical Summary This document provides an overview and rationale of the multicast security architecture used for large multicast groups. The document begins by introducing a Multicast Security Reference Framework, and proceeds to identify the security services that may be part of a secure multicast solution. Working Group Summary The MSEC came to consensus on this document. Protocol Quality This document was reviewed by Russell Housley for the IESG.