Cryptology ePrint Archive: Report 2002/084
Towards Provably-Secure Timed E-Commerce: The Trusted Delivery Layer
Abstract: Certified exchange of messages is an essential mechanism for e-commerce; the timing aspects (timeouts and timestamps) are very important for practical applications. However existing formal methods for security analysis assume simplified completely synchronous or completely asynchronous models, and cannot deal with the timing aspects of these (and other e-commerce) protocols. We present model for realistic, Δ-synchronized adversarial settings. We then present a simple, efficient and provably-secure protocol for certified, time-stamped message delivery, providing precise guarantees of delay and timestamps. Our model and analysis use concrete (rather than asymptotic) notions of security.
Category / Keywords: secure electronic commerce; non-repudiation; timestamp; certified delivery; certified mail; certified e-mail; notarized delivery; notarization; e-banking; contract signing; timestamping
Date: received 27 Jun 2002, last revised 8 Feb 2004
Contact author: herzbea at cs biu ac il
Available formats: PDF | BibTeX Citation
Note: Substantially improved version.
Version: 20040208:163009 (All versions of this report)
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