<div class="csl-bib-body">
<div class="csl-entry">Alwen, J., Fuchsbauer, G., & Mularczyk, M. (2024). Updatable Public-Key Encryption, Revisited. In <i>Advances in Cryptology – EUROCRYPT 2024</i> (pp. 346–376). https://doi.org/10.1007/978-3-031-58754-2_13</div>
</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/200903
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dc.description.abstract
We revisit Updatable Public-Key Encryption (UPKE), which was introduced as a practical mechanism for building forward-secure cryptographic protocols. We begin by observing that all UPKE notions to date are neither syntactically flexible nor secure enough for the most important multi-party protocols motivating UPKE. We provide an intuitive taxonomy of UPKE properties – some partially or completely overlooked in the past – along with an overview of known (explicit and implicit) UPKE constructions. We then introduce a formal UPKE definition capturing all intuitive properties needed for multi-party protocols. Next, we provide a practical pairing-based construction for which we provide concrete bounds under a standard assumption in the random oracle and the algebraic group model. The efficiency profile of the scheme compares very favorably with existing UPKE constructions (despite the added flexibility and stronger security). For example, when used to improve the forward security of the Messaging Layer Security protocol [RFC9420], our new UPKE construction requires less than 1.5% of the bandwidth of the next-most efficient UPKE construction satisfying the strongest UPKE notion considered so far.
en
dc.description.sponsorship
FWF - Österr. Wissenschaftsfonds
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dc.description.sponsorship
WWTF Wiener Wissenschafts-, Forschu und Technologiefonds
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dc.language.iso
en
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dc.relation.ispartofseries
Lecture Notes in Computer Science
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dc.subject
Updatable Public-Key Encryption
en
dc.subject
forward secrecy
en
dc.subject
UKEM
en
dc.title
Updatable Public-Key Encryption, Revisited
en
dc.type
Inproceedings
en
dc.type
Konferenzbeitrag
de
dc.contributor.affiliation
American Welding Society, United States of America (the)
-
dc.contributor.affiliation
American Welding Society, United States of America (the)
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dc.relation.isbn
9783031587535
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dc.description.startpage
346
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dc.description.endpage
376
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dc.relation.grantno
F 8500
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dc.relation.grantno
Projektnummer VRG18-002
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dc.type.category
Full-Paper Contribution
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tuw.booktitle
Advances in Cryptology – EUROCRYPT 2024
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tuw.container.volume
LNCS 14657
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tuw.peerreviewed
true
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tuw.book.ispartofseries
EUROCRYPT: Annual International Conference on the Theory and Applications of Cryptographic Techniques
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tuw.project.title
Semantische und kryptografische Grundlagen von Informationssicherheit und Datenschutz durch modulares Design
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tuw.project.title
Cryptographic Foundations of Privacy in Distributed Ledgers
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tuw.researchTopic.id
I1
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tuw.researchTopic.name
Logic and Computation
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tuw.researchTopic.value
100
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tuw.publication.orgunit
E192-06 - Forschungsbereich Security and Privacy
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tuw.publisher.doi
10.1007/978-3-031-58754-2_13
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dc.description.numberOfPages
31
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tuw.author.orcid
0000-0002-4473-903X
-
tuw.author.orcid
0000-0002-9462-1275
-
tuw.event.name
43rd Annual International Conference on the Theory and Applications of Cryptographic Techniques (EUROCRYPT 2024)
en
tuw.event.startdate
26-05-2024
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tuw.event.enddate
30-05-2024
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tuw.event.online
On Site
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tuw.event.type
Event for scientific audience
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tuw.event.place
Zurich
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tuw.event.country
CH
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tuw.event.presenter
Mularczyk, Marta
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wb.sciencebranch
Informatik
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wb.sciencebranch
Mathematik
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wb.sciencebranch.oefos
1020
-
wb.sciencebranch.oefos
1010
-
wb.sciencebranch.value
80
-
wb.sciencebranch.value
20
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item.fulltext
no Fulltext
-
item.openairecristype
http://purl.org/coar/resource_type/c_5794
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item.languageiso639-1
en
-
item.cerifentitytype
Publications
-
item.openairetype
conference paper
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item.grantfulltext
none
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crisitem.author.dept
American Welding Society, United States of America (the)
-
crisitem.author.dept
E192-06 - Forschungsbereich Security and Privacy
-
crisitem.author.dept
American Welding Society, United States of America (the)
-
crisitem.author.orcid
0000-0002-4473-903X
-
crisitem.author.orcid
0000-0002-9462-1275
-
crisitem.author.parentorg
E192 - Institut für Logic and Computation
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crisitem.project.funder
FWF - Österr. Wissenschaftsfonds
-
crisitem.project.funder
WWTF Wiener Wissenschafts-, Forschu und Technologiefonds