So, how do you go about using BXXP?

      First, get the specification [32] and read it. Next, define your own profile. Finally, get a TCP port number for your protocol and start implementing.

      The BXXP specification defines five profiles itself: a channel management profile, three user authentication profiles, and a transport layer security profile. These provide good examples. Of course, we've been using BXXP internally for a year now, so if you want to look at a rather detailed profile definition, check out the Blocks Simple Exchange [31] profile. It addresses the issue of naming for its application domain, and, in doing so, opens the door for authorization.

      Since we published BXXP as an Internet-draft for comments we've gotten some pretty good feedback. Prior to the next meeting of the IETF, we'll be publishing an updated specification along with a couple of open source implementations. So, you might want to wait a few weeks before you start implementation.

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