Applying pi-Calculus to Practice: An Example of a Unified Security Mechanism

The Pi-calculus has been developed to reason about behavioural equivalence. Different notions of equivalence are defined in terms of process interactions, as well as the context of processes. There are various extensions of the Pi-calculus, such as the SPI calculus, which has primitives to facilitate security protocol design. Another area of computer security is access control research, which includes problems of access control models, policies and access control mechanism. The design of a unified framework for access control requires that all policies are supported and different access control models are instantiated correctly. In this paper we will utilise the Pi calculus to reason about access control policies and mechanism. An equivalence of different policy implementations, as well as access control mechanism will be shown. Finally some experiences regarding the use of Pi-calculus are presented

Method for Carrying out an Automatic Braking Action

The present invention relates to a method for carrying out an automatie braking action, wherein at least one quantity representative of the application of the brake pedal is determined and an automatie braking action is triggered when at least one limit value (brake pedal application limit value) of the quantity representative of the application of the brake pedal is exceeded, wherein the brake pedal application limit value is modified or the quantity representative of the brake pedal is weighted according to at least one action of the driver, in particular adetected movement of the driver's foot, prior to an application of the brake pedal of the braking action considered or prior to the considered braking action