Sponsor
Portland State University. Department of Computer Science
First Advisor
Thomas Shrimpton
Date of Publication
Summer 8-7-2015
Document Type
Dissertation
Degree Name
Doctor of Philosophy (Ph.D.) in Computer Science
Department
Computer Science
Language
English
Subjects
Cryptography -- Mathematics, Computer security, Computer systems -- Access control, Data encryption (Computer science)
DOI
10.15760/etd.2481
Physical Description
1 online resource (vi, 94 pages)
Abstract
Tweakable ciphers are a building block used to construct a variety of cryptographic algorithms. Typically, one proves (via a reduction) that a tweakable-cipher-based algorithm is about as secure as the underlying tweakable cipher. Hence improving the security or performance of tweakable ciphers immediately provides corresponding benefits to the wide array of cryptographic algorithms that employ them. We introduce new tweakable ciphers, some of which have better security and others of which have better performance than previous designs. Moreover, we demonstrate that tweakable ciphers can be used directly (as opposed to as a building block) to provide authenticated encryption with associated data in a way that (1) is robust against common misuses and (2) can, in some cases, result in significantly shorter ciphertexts than other approaches.
Rights
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Persistent Identifier
http://archives.pdx.edu/ds/psu/15931
Recommended Citation
Terashima, Robert Seth, "Tweakable Ciphers: Constructions and Applications" (2015). Dissertations and Theses. Paper 2484.
https://doi.org/10.15760/etd.2481