Dear LoA Colleagues, The JISC funded ES-LoA project would like to consult with service and identity providers and Grid/e-Science community for their views on using a risk-based authentication and authorisation scheme. Such a scheme, built on top of open standards based middleware such as Shibboleth, would take into account the level of confidence in users' identification through their identity and attribute assertions when deciding whether or not to permit access to a particular resource. May I invite you to take the time to answer the ES-LoA Survey questionnaire, available from http://www.es-loa.org/output, by Friday 8th June 2007 - you can either fill in the questionnaire on-line, or download a copy and email your response to es-loa@manchester.ac.uk. Many thanks for your help in advance. BW Ning *************************************** Dr N Zhang Room KB 2.113 School of Computer Science University of Manchester Oxford Road Manchester M13 9PL England, UK Email: nzhang@cs.man.ac.uk Tel: (+44) (0)161 275 6117 Fax: (+44) (0)161 275 6204 Web: http://www.manchester.ac.uk/cs/people/zhang