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dc.contributor.advisorRubin, Aviel
dc.creatorKaptchuk, Gabriel
dc.date.accessioned2021-01-08T17:04:48Z
dc.date.available2021-01-08T17:04:48Z
dc.date.created2020-08
dc.date.issued2020-04-20
dc.date.submittedAugust 2020
dc.identifier.urihttp://jhir.library.jhu.edu/handle/1774.2/63444
dc.description.abstractThe last decade and a half has seen the rise of a new class of systems loosely categorized as public ledgers. Public ledgers guarantee that all posted information is permanently available to the entire public. Common realizations of public ledgers include public blockchains and centralized logs. In this work we investigate novel applications of public ledgers. We begin by describing enclave ledger interaction, a computational method that allows the execution of trusted execution environments or cryptographically obfuscated programs to be conditioned on the contents of the ledger. We then show how this conditional execution paradigm can be used to achieve fairness in dishonest majority secure multiparty computation, which is impossible in the plain model. Finally, we show how conditional execution can be used to build systems that facilitate law enforcement access to ciphertext while ensuring robust transparency and accountability mechanisms.
dc.format.mimetypeapplication/pdf
dc.language.isoen_US
dc.publisherJohns Hopkins University
dc.subjectcryptography
dc.subjectapplied cryptography
dc.subjectpublic ledgers
dc.subjectblockchain
dc.subjectblockchains
dc.subjectmultiparty computation
dc.subjectMPC
dc.subjectfairness
dc.subjecttrusted execution
dc.subjectenclave
dc.subjectexceptional access
dc.subjectgoing dark
dc.subjectencryption
dc.subject
dc.titleNew Applications Of Public Ledgers
dc.typeThesis
thesis.degree.disciplineComputer Science
thesis.degree.grantorJohns Hopkins University
thesis.degree.grantorWhiting School of Engineering
thesis.degree.levelDoctoral
thesis.degree.namePh.D.
dc.date.updated2021-01-08T17:04:48Z
dc.type.materialtext
thesis.degree.departmentComputer Science
dc.contributor.committeeMemberGreen, Matthew
dc.contributor.committeeMemberJain, Abhishek
dc.publisher.countryUSA
dc.creator.orcid0000-0002-8886-4748


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