In general, in one aspect, the invention relates to a method for accessing encrypted data by a client. The method includes receiving from the client by a server client information derived from a first secret wherein the client information is derived such that the server can not feasibly determine the...http://www.google.com.au/patents/US7716484?utm_source=gb-gplus-sharePatent US7716484 - System and method for increasing the security of encrypted secrets and authentication
