Types for Location and Data Security in Cloud Environments

Ivan Gazeau, Tom Chothia, Dominic Duggan

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

Cloud service providers are often trusted to be genuine, the damage caused by being discovered to be attacking their own customers outweighs any benefits such attacks could reap. On the other hand, it is expected that some cloud service users may be actively malicious. In such an open system, each location may run code which has been developed independently of other locations (and which may be secret). In this paper, we present a typed language which ensures that the access restrictions put on data on a particular device will be observed by all other devices running typed code. Untyped, compromised devices can still interact with typed devices without being able to violate the policies, except in the case when a policy directly places trust in untyped locations. Importantly, our type system does not need a middleware layer or all users to register with a preexisting PKI, and it allows for devices to dynamically create new identities. The confidentiality property guaranteed by the language is defined for any kind of intruder: we consider labeled bisimilarity i.e. an attacker cannot distinguish two scenarios that differ by the change of a protected value. This shows our main result that, for a device that runs well typed code and only places trust in other well typed devices, programming errors cannot cause a data leakage.

Original languageEnglish
Title of host publicationProceedings - IEEE 30th Computer Security Foundations Symposium, CSF 2017
Pages376-391
Number of pages16
ISBN (Electronic)9781538632161
DOIs
StatePublished - 25 Sep 2017
Event30th IEEE Computer Security Foundations Symposium, CSF 2017 - Santa Barbara, United States
Duration: 21 Aug 201725 Aug 2017

Publication series

NameProceedings - IEEE Computer Security Foundations Symposium
ISSN (Print)1940-1434

Conference

Conference30th IEEE Computer Security Foundations Symposium, CSF 2017
Country/TerritoryUnited States
CitySanta Barbara
Period21/08/1725/08/17

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