Scott, > - address any questions about the differences between this > and the browser proposal There seem to be two principal differences between your proposal and Klaas': 1. The use of the POAS binding within the SASL mechanism between the RP and the client. 2. The use of SOAP binding between the client and the IdP. Is that a reasonable summary? josh. JANET(UK) is a trading name of The JNT Association, a company limited by guarantee which is registered in England under No. 2881024 and whose Registered Office is at Lumen House, Library Avenue, Harwell Science and Innovation Campus, Didcot, Oxfordshire. OX11 0SG