The Z notation: a reference manual
The Z notation: a reference manual
Z in practice
Using Z: specification, refinement, and proof
Using Z: specification, refinement, and proof
Computer security
Proceedings of the Z User Workshop
More Powerful Z Data Refinement: Pushing the State of the Art in Industrial Refinement
ZUM '98 Proceedings of the 11th International Conference of Z Users on The Z Formal Specification Notation
Design and verification of secure systems
SOSP '81 Proceedings of the eighth ACM symposium on Operating systems principles
CSP and determinism in security modelling
SP '95 Proceedings of the 1995 IEEE Symposium on Security and Privacy
Retrenching the Purse: The Balance Enquiry Quandary, and Generalised and (1,1) Forward Refinements
Fundamenta Informaticae - This is a SPECIAL ISSUE ON ASM'05
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We have recently completed the specification and security proof of a large, industrial scale application. The application is security critical, and the modelling and proof were done to increase the client's assurance that the implemented system had no design flaws with security implications. Here we describe the application, specification structure, and proof approach. One of the security properties of our system is of the kind not preserved in general by refinement. We had to perform a proof that this property, expressed over traces, holds in our state-and-operations style model.