12 research outputs found
Redactable and Sanitizable Signature Schemes: Applications and Limitations for use in Decentralized Digital Identity Systems
Redactable signature schemes and sanitizable signature schemes are methods
that permit modification of a given digital message and retain a valid
signature. This can be applied to decentralized identity systems for delegating
identity issuance and redacting sensitive information for privacy-preserving
verification of identity. We propose implementing these protocols on a digital
credential and compare them against other privacy-enhancing techniques to
assess their suitabilityComment: Extended Abstract, 3 Pages, 1 Figure, International Conference on AI
and the Digital Economy 202
Redactable Signature Schemes and Zero-knowledge Proofs: A comparative examination for applications in Decentralized Digital Identity Systems
Redactable Signature Schemes and Zero-Knowledge Proofs are two radically
different approaches to enable privacy. This paper analyses their merits and
drawbacks when applied to decentralized identity system. Redactable Signatures,
though competitively quick and compact, are not as expressive as zero-knowledge
proofs and do not provide the same level of privacy. On the other hand,
zero-knowledge proofs can be much faster but some protocols require a trusted
set-up. We conclude that given the benefits and drawbacks, redactable
signatures are more appropriate at an earlier stage and zero-knowledge proofs
are more appropriate at a later stage for decentralized identity systemsComment: 9 Pages, Trustworthy digital identity international conference 202
Measurement of the branching fractions for Cabibbo-suppressed decays and at Belle
International audienceWe present measurements of the branching fractions for the singly Cabibbo-suppressed decays and , and the doubly Cabibbo-suppressed decay , based on 980 of data recorded by the Belle experiment at the KEKB collider. We measure these modes relative to the Cabibbo-favored modes and . Our results for the ratios of branching fractions are , , and , where the uncertainties are statistical and systematic, respectively. The second value corresponds to , where is the Cabibbo angle; this value is larger than other measured ratios of branching fractions for a doubly Cabibbo-suppressed charm decay to a Cabibbo-favored decay. Multiplying these results by world average values for and yields , , and , where the third uncertainty is due to the branching fraction of the normalization mode. The first two results are consistent with, but more precise than, the current world averages. The last result is the first measurement of this branching fraction
Measurement of the production ratio in collisions at the resonance using decays at Belle
We measure the ratio of branching fractions for the decays to and using and samples, where stands for ( or ), with fb of data collected at the resonance with the Belle detector. We find the decay rate ratio of over to be , which is the most precise measurement to date. The first and second uncertainties are statistical and systematic, respectively, and the third uncertainty is systematic due to the assumption of isospin symmetry in
Measurement of branching fractions of and at Belle
We present a study of a singly Cabibbo-suppressed decay and a Cabibbo-favored decay based on 980 of data collected by the Belle detector, operating at the KEKB energy-asymmetric collider. We measure their branching fractions relative to : and . Combining with the world average , we have the absolute branching fractions: and . The first and second uncertainties are statistical and systematic, respectively, while the third ones arise from the uncertainty on . The mode is observed for the first time and has a statistical significance of . The branching fraction of has been measured with a threefold improvement in precision over previous results and is found to be consistent with the world average
Measurement of the lifetime at Belle II
We report on a measurement of the lifetime using decays reconstructed in data collected by the Belle II experiment and corresponding to of integrated luminosity. The result, , agrees with recent measurements indicating that the is not the shortest-lived weakly decaying charmed baryon
Measurement of the lifetime at Belle II
We report on a measurement of the lifetime using decays reconstructed in data collected by the Belle II experiment and corresponding to of integrated luminosity. The result, , agrees with recent measurements indicating that the is not the shortest-lived weakly decaying charmed baryon
Measurement of the lifetime at Belle II
We report on a measurement of the lifetime using decays reconstructed in data collected by the Belle II experiment and corresponding to of integrated luminosity. The result, , agrees with recent measurements indicating that the is not the shortest-lived weakly decaying charmed baryon