[ Changed 4th March 1998 ]
Priority Driven Communication Protocol Design was a methodology for designing communications protocols which was introduced about fifteen years ago. In this seminar I shall attempt to rehabilitate PDCPD in the context of security protocols, arguing that treating PDCPD as a conceptual framework for reasoning about the design and optimization of protocols (rather than as a design methodology per se) can provide insight into managing the effects of laying off tasks to only partially trusted third parties in order to improve performance: the analagous design problem in 'conventional' communications protocol design is de-layering.