NDLI: Redactable signatures on data with dependencies and their application to personal health records

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Redactable signatures on data with dependencies and their application to personal health records

Content Provider	ACM Digital Library
Author	Bauer, David Blough, Douglas M. Mohan, Apurva
Abstract	Storage of personal information by service providers risks privacy loss from data breaches. Our prior work on minimal disclosure credentials presented a mechanism to control the dissemination of personal information. In that work, personal data was broken into individual claims, which can be released in arbitrary subsets while still being cryptographically verifiable. In applying that work, we encountered the problem of connections between claims, which manifest as disclosure dependencies. In this work, we provide an efficient way to provide minimal disclosure, but with cryptographic enforcement of dependencies between claims, as specified by the claims certifier. This provides a mechanism for redactable signatures on data with disclosure dependencies. We show that an implementation of our scheme can verify thousands of dependent claims in tens of milliseconds. We also describe ongoing work in which the approach is being used within a larger system for dispensing personal health records.
Starting Page	91
Ending Page	100
Page Count	10
File Format	PDF
ISBN	9781605587837
DOI	10.1145/1655188.1655201
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2009-11-09
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Signature scheme Merkle hash tree Redaction Dependency Identity management Information dissemination control
Content Type	Text
Resource Type	Article

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