Salutations, On behalf of the UK JISC (http://www.jisc.ac.uk/), the ES-LoA Project (E-infrastructure Security: authentication Levels of Assurance) is soliciting views from the community of services, and identity and resource providers about the use-of/need-for 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. The principle objectives of the ES-LoA project are as follows: o to raise the community's awareness with regard to authentication Levels of Assurance (LoA) as one of the factors that can be used to quantify the degree of protection for resources with varying levels of sensitivity in federated environments, o to investigate potential applications of LoA to various types of service, including resources provided for the grid/e-Science community, and library and e-learning resources, o to build community consensus in using the appropriate definition of LoA reflecting the trustworthiness of a resource's authentication mechanism, and o to raise service providers' interests in deploying a technology that can help them to achieve LoA linked fine-grained access control. If you provide, or plan to provide, a service or client infrastructure that issues or consumes credentials for authentication we would be grateful if you would take time to participate in this survey. The results will also form input to the Open Grid Forum's activity in this area through the LoA research group. The survey, entitled "ES-LoA Survey Questionnaire", is available from http://www.es-loa.org/output. Please either fill in the online form or return the completed Word document to es-loa@manchester.ac.uk by Friday 8th June 2007. Thank you for your time and valuable information, the ES-LoA project team.