D. Aspinall

Publications167
h-index21
Citations2,656
Highly Influential Citations160
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On Validity of Program Transformations in the Java Memory Model
TLDR
This study analyzes the validity of several common program transformations in multi-threaded Java, and reveals some cases where the Sun Hotspot JVM does not comply with the Java Memory Model.
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Proof General: A Generic Tool for Proof Development
TLDR
This note describes Proof General, a tool for developing machine proofs with an interactive proof assistant that provides a powerful user-interface with relatively little effort, alleviating the need for a proof assistant to provide its own GUI, and providing a uniform appearance for diverse proof assistants.
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Data Driven Authentication: On the Effectiveness of User Behaviour Modelling with Mobile Device Sensors
TLDR
A lightweight, and temporally and spatially aware user behaviour modelling technique for sensor-based authentication that automatically switches from training mode to deployment mode when the user's behaviour is sufficiently learned and allows the device to automatically determine a suitable detection threshold.
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Formalising Java's Data Race Free Guarantee
TLDR
The data race free (DRF) guarantee provided by Java, as captured by the semi-formal Java Memory Model (JMM), is formalised and found that not all of the anticipated conditions in the JMM definition were actually necessary for the DRF guarantee.
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Personal choice and challenge questions: a security and usability assessment
TLDR
An experimental investigation into user-chosen questions found that many participants were likely to have chosen questions with low entropy answers, yet they believed that their challenge questions would resist attacks from a stranger, and a marked improvement in security for most users.
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Subtyping dependent types
TLDR
This work investigates a subtyping extension of the system /spl lambda/P, which is an abstract version of the type system of the Edinburgh Logical Framework LF, and establishes some important properties of the new system, including subject reduction.
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A Framework for Interactive Proof
TLDR
The goal of the framework is to enable flexible environments for managing formal proofs across their life-cycle: creation, maintenance and exploitation.
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Another Type System for In-Place Update
TLDR
A new typing scheme is defined which better approximates the semantic property of soundness of in-place update for a functional semantics and is used to annotate function argument types.
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Security testing for Android mHealth apps
TLDR
This paper proposes a testing method for Android mHealth apps which is designed using a threat analysis, considering possible attack scenarios and vulnerabilities specific to the domain, and applies it to apps for managing hypertension and diabetes.
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Subtyping with Singleton Types
We give syntax and a PER-model semantics for a typed λ-calculus with subtypes and singleton types. The calculus may be seen as a minimal calculus of subtyping with a simple form of dependent types.…
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