Title:
Analysis of a Redactable Signature Scheme on Data With Dependencies
Analysis of a Redactable Signature Scheme on Data With Dependencies
Author(s)
Bauer, David
Blough, Douglas M.
Blough, Douglas M.
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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 limit
the amount of personal information provided. 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 further prior work, we provide an efficient
way to provide minimal disclosure, but with cryptographic
enforcement of dependencies between claims, as specified by the
claims certifier. Now, this work provides security proofs showing
that the scheme is secure against forgery and the violation of
dependencies in the random oracle model. Additional motivation
is provided for a preservation of privacy and security in the
standard model.
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Date Issued
2009
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Text
Resource Subtype
Technical Report