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Transparency Overlays and Applications

Chase, M; Meiklejohn, S; (2016) Transparency Overlays and Applications. Cryptology ePrint Archive Green open access

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Abstract

In this paper, we initiate a formal study of transparency, which in recent years has become an increasingly critical requirement for the systems in which people place trust. We present the abstract concept of a transparency overlay, which can be used in conjunction with any system to give it provable transparency guarantees, and then apply the overlay to two settings: Certificate Transparency and Bitcoin. In the latter setting, we show that the usage of our transparency overlay eliminates the need to engage in mining and allows users to store a single small value rather than the entire blockchain. Our transparency overlay is generically constructed from a signature scheme and a new primitive we call a dynamic list commitment, which in practice can be instantiated using a collision-resistant hash function.

Type: Working / discussion paper
Title: Transparency Overlays and Applications
Open access status: An open access version is available from UCL Discovery
Publisher version: https://eprint.iacr.org/2016/915.pdf
Language: English
Additional information: This version is the author manuscript.
URI: http://discovery.ucl.ac.uk/id/eprint/10055892
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