Web Services Verification and Prudent Implementation

Alice&Bob notation is widely used to describe conversations between partners in security protocols. We present a tool that compiles an Alice&Bob description of a Web Services choreography into a set of servlets. For that we first compute for each partner an executable specification as prudent as possible of her role in the choreography. This specification is expressed in ASLan language, a formal language designed for modeling Web Services tied with security policies. Then we can check with automatic tools that this ASLan specification verifies some required security properties such as secrecy and authentication. If no flaw is found, we compile the specification into Java servlets that real partners can use to execute the choreography.