{"id":{"repo_id":"mit","oai_identifier":"oai:dspace.mit.edu:1721.1/82402"},"canonical_url":"https://search.dev.ndltd.org/etd/mit/oai:dspace.mit.edu:1721.1/82402","repository":{"repo_id":"mit","name":"MIT","base_url":"https://dspace.mit.edu/oai/request"},"display":{"title":"Functional signatures","abstract":"In this thesis, we introduce the notion of functional signatures. In a functional signature scheme, in addition to a master signing key that can be used to sign any message, there are signing keys for a function f, which allow one to sign any message in the range of f. An immediate application of functional signature scheme is the delegation by a master authority to a third party of the ability to sign a restricted set of messages. We also show applications of functional signature in constructing succinct non-interactive arguments and delegation schemes. 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We give several constructions for this primitive, and describe the trade-offs between them in terms of the assumptions they require and the size of the signatures.","abstract_has_math":false,"creators":["Ivan, Ioana (Ioana Elisabeta)"],"institution":"Massachusetts Institute of Technology","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":"Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science.","school":null,"contributors":[],"advisors":["Shafrira Goldwasser."],"committee_chairs":[],"committee_members":[],"year":2013,"date_issued":"2013","date_published":"2013","updated_at":"2026-07-22T22:21:44Z","subjects":["Electrical Engineering and Computer Science."],"languages":["eng"],"rights":["M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. 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