Elizabeth C. Crites

My current research interests are in public-key cryptography and include the following:

Publications

Threshold Structure-Preserving Signatures
Elizabeth Crites, Markulf Kohlweiss, Bart Preneel, Mahdi Sedaghat, Daniel Slamanig
First threshold structure-preserving signature scheme.
[ePrint]

Better than Advertised Security for Non-Interactive Threshold Signatures
Mihir Bellare, Elizabeth Crites, Chelsea Komlo, Mary Maller, Stefano Tessaro, Chenzhi Zhu
Security analysis for the FROST and BLS threshold signature schemes.
CRYPTO 2022.

How to Prove Schnorr Assuming Schnorr: Security of Multi- and Threshold Signatures
Elizabeth Crites, Chelsea Komlo, Mary Maller
Efficient two- and three-round multi- and threshold Schnorr signatures.
Results included in the FROST IETF draft. [ePrint]

Mercurial Signatures for Variable-Length Messages
Elizabeth C. Crites, Anna Lysyanskaya
Extended mercurial signatures to allow messages of unbounded length (e.g., credential attributes).
Privacy Enhancing Technologies Symposium -- PETS 2021. [ePrint]

Reputable List Curation from Decentralized Voting
Elizabeth C. Crites, Mary Maller, Sarah Meiklejohn, Rebekah Mercer
Constructed a token-curated registry from a voting protocol with ballot secrecy.
Privacy Enhancing Technologies Symposium -- PETS 2020. [ePrint]

Delegatable Anonymous Credentials from Mercurial Signatures.
Elizabeth C. Crites, Anna Lysyanskaya
Constructed first efficient scheme for issuing, presenting, and delegating credentials anonymously.
The Cryptographers' Track at the RSA Conference -- CT-RSA 2019. [ePrint]

Ph.D. Thesis

Delegatable Anonymous Credentials from Mercurial Signatures
Introduced a new type of digital signature, called a mercurial signature, and constructed first efficient delegatable anonymous credential (DAC) scheme. Extended mercurial signatures to allow messages of unbounded length. Constructed DAC scheme for multiple certification authorities.
Brown University Library, 2019. 202 pgs. [link]

My research has been funded by the University of Edinburgh Blockchain Technology Lab, the UK Engineering and Physical Sciences Research Council (EPSRC) Grant EP/N028104/1: "Glass Houses: Transparency and Privacy in Information Economies" as well as the US National Science Foundation (NSF) Grant 1422361: "Empowering Anonymity."


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