Xen and the art of virtualization
SOSP '03 Proceedings of the nineteenth ACM symposium on Operating systems principles
Terra: a virtual machine-based platform for trusted computing
SOSP '03 Proceedings of the nineteenth ACM symposium on Operating systems principles
Property-based attestation for computing platforms: caring about properties, not mechanisms
NSPW '04 Proceedings of the 2004 workshop on New security paradigms
A protocol for property-based attestation
Proceedings of the first ACM workshop on Scalable trusted computing
Secure data management in trusted computing
CHES'05 Proceedings of the 7th international conference on Cryptographic hardware and embedded systems
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This is an early work that focuses on sealing, one of the functions introduced by Trusted Computing Group in the specification of Trusted Platform Module. Sealing allows to cryptographically bind data to a specific system state. We consider that availability of sealed data is an important issue, because once the system state is modified (e.g. after a software update) it may be impossible to unseal data. We explore the idea of an architecture based on a sealing proxy to mitigate this problem. We also provide a proof of concept implementation and we show that the proposed architecture, dealing with a simple software property, can be extended towards a more general property-based sealing.