A Hierarchy of Authentication Specifications
CSFW '97 Proceedings of the 10th IEEE workshop on Computer Security Foundations
Trust Relationships in Secure Systems-A Distributed Authentication Perspective
SP '93 Proceedings of the 1993 IEEE Symposium on Security and Privacy
Survey on location authentication protocols and spatial-temporal attestation services
EUC'05 Proceedings of the 2005 international conference on Embedded and Ubiquitous Computing
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Location aware services are expected to make up a large share of the mobile telephone market in the future. The services proposed so far make use of uncertified location information--information push services, guidance systems, positioning for emergency calls, etc. We propose a service that provides certified location information. Integrated with cryptographic digital signatures this service enables the determination of the current position of the signer in a provable way. Such certified location information--called location stamp--can be applied in electronic commerce, e.g. for determination of applicable laws or taxes.