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See detailSecurity in the Shell : An Optical Physical Unclonable Function made of Shells of Cholesteric Liquid Crystals
Lenzini, Gabriele UL; Samir, Ouchani; Roenne, Peter UL et al

in Proc. of the 9th IEEE Workshop on Information Forensics and Security (2017, October 02)

We describe the application in security of shells of Cholesteric Liquid Crystals (ChLCs). Such shells have a diameter in the microns range and can be gathered in hundreds in a surface area as small as a ... [more ▼]

We describe the application in security of shells of Cholesteric Liquid Crystals (ChLCs). Such shells have a diameter in the microns range and can be gathered in hundreds in a surface area as small as a nail’s head. Because of their structural properties, a bundle of them reflects light, creating colorful patterns that we argue to be unique and computationally hard to predict. We argue also that the bundle itself is unclonable. These are typical properties of Physically Unclonable Functions, a family to which shells of ChLCs belong too. Herein we discuss their physical and security properties and their potential use in object authentication. [less ▲]

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See detailDeniability in Quantum Cryptography
Atashpendar, Arash UL; Roenne, Peter UL; Ostrev, Dimiter UL et al

Poster (2017, June 14)

This poster describes ongoing work on deniability in quantum cryptography, an area of research that remains almost entirely unexplored in the quantum information processing literature. Deniability is a ... [more ▼]

This poster describes ongoing work on deniability in quantum cryptography, an area of research that remains almost entirely unexplored in the quantum information processing literature. Deniability is a well-known and fundamental concept in classical cryptography and it can be defined as the ability for the sender of a message to deny the contents of a message or the very act of having participated in an exchange, e.g. having sent the said message. We discuss deniability in the context of quantum key exchange and address a particular problem, first discovered by Donald Beaver, where he claims that all QKD protocols are undeniable. The claim is that while we do get a one-time pad (OTP) using QKD, it does not provide the property of key equivocation as it is expected in the Shannon sense for a OTP. Intuitively, this difficulty lies in the quantum channel alone and it has to do with the fact that in QKD, while we generate entropy by expanding an initially short pre-shared key into an arbitrary longer secret key, we do so by exchanging information over a quantum as well as a classical channel, which could potentially leave a binding transcript of Alice's decisions to the final secret key. This is in contrast with the implicit assumption that Eve knows nothing about how two given parties have established their shared OTP in the first place. We discuss the importance of deniability in cryptography and its wide range of applications, along with cryptographic primitives other than key exchange where deniability might be a desired property. Finally, we present a series of fundamental open questions in this area of research and discuss quantum cryptographic primitives that lend themselves to devising deniable protocols. [less ▲]

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See detailUsing Selene to Verify your Vote in JCJ
Iovino, Vincenzo UL; Rial Duran, Alfredo UL; Roenne, Peter UL et al

in Workshop on Advances in Secure Electronic Voting (VOTING'17) (2017, April 07)

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See detailIs a visuo-haptic differentiation of zebra mussel and quagga mussel based on a single external morphometric shell character possible?
Teubner, Diana; Wesslein, Ann-Katrin; Roenne, Peter UL et al

in Aquatic Invasions (2016)

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See detailJCJ with Improved Verifiability Guarantees
Roenne, Peter UL

Scientific Conference (2016)

Detailed reference viewed: 69 (2 UL)
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See detailCorrespondences between WZNW models and CFTs with W-algebra symmetry
Creutzig, Thomas; Hikida, Yasuaki; Roenne, Peter UL

in JHEP (2016), 02

Detailed reference viewed: 51 (5 UL)
See detail(Universal) Unconditional Verifiability in E-Voting without Trusted Parties
Gallegos-Garcia, Gina; Iovino, Vincenzo UL; Roenne, Peter UL et al

E-print/Working paper (2016)

Detailed reference viewed: 41 (2 UL)
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See detailMarginal deformations and the Higgs phenomenon in higher spin AdS3 holography
Hikida, Yasuaki; Roenne, Peter Browne UL

in Journal of High Energy Physics [=JHEP] (2015), 7

Detailed reference viewed: 35 (9 UL)
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See detailSelene: Voting with Transparent Verifiability and Coercion-Mitigation
Ryan, Peter UL; Roenne, Peter UL; Iovino, Vincenzo UL

in Abstract book of 1st Workshop on Advances in Secure Electronic Voting (2016), 2015

Detailed reference viewed: 230 (26 UL)
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See detailOn the Possibility of Non-Interactive E-Voting in the Public-key Setting
Giustolisi, Rosario; Iovino, Vincenzo UL; Roenne, Peter UL

in IACR Cryptology ePrint Archive (2015), 2015

Detailed reference viewed: 58 (8 UL)
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See detailHigher spin AdS3 holography and superstring theory
Roenne, Peter Browne UL; Creutzig, Thomas; Hikida, Yasuaki

Scientific Conference (2015)

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See detailHigher spin AdS$_3$ holography with extended supersymmetry
Creutzig, Thomas; Hikida, Yasuaki; Roenne, Peter Browne UL

in Journal of High Energy Physics [=JHEP] (2014), 1410

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See detailUnitary W-algebras and three-dimensional higher spin gravities with spin one symmetry
Afshar, Hamid; Creutzig, Thomas; Grumiller, Daniel et al

in Journal of High Energy Physics [=JHEP] (2014)

Detailed reference viewed: 47 (3 UL)
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See detailHigher spin AdS$_3$ supergravity and its CFT dual
Creutzig, Thomas; Hikida, Yasuaki; Roenne, Peter Browne UL

in International Journal of Modern Physics: Conference Series (2013)

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See detailN=1 supersymmetric higher spin holography on AdS3
Creutzig, T.; Hikida, Y.; Roenne, Peter Browne UL

in Journal of High Energy Physics (2013), 2013(2),

We propose a duality between a higher spin N=1 supergravity on AdS 3 and a large N limit of a family of N=(1,1) superconformal field theories. The gravity theory is an N=1 truncation of the N=2 ... [more ▼]

We propose a duality between a higher spin N=1 supergravity on AdS 3 and a large N limit of a family of N=(1,1) superconformal field theories. The gravity theory is an N=1 truncation of the N=2 supergravity found by Prokushkin and Vasiliev, and the dual conformal field theory is defined by a supersymmetric coset model. We check this conjecture by comparing one loop partition functions and find agreement. Moreover, we study the symmetry of the dual coset model and in particular compute fields of the coset algebra of dimension 3/2, 2, 2 and 5/2 explicitly. © 2013 SISSA, Trieste, Italy. [less ▲]

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See detailThree point functions in higher spin AdS3 supergravity
Creutzig, T.; Hikida, Y.; Roenne, Peter Browne UL

in Journal of High Energy Physics (2013), 2013(1),

In a previous work we have proposed that the Prokushkin-Vasiliev higher spin N = 2 supergravity on AdS3 is dual to a large N limit of the N = (2,2) ℂPN Kazama- Suzuki model. There is now strong evidence ... [more ▼]

In a previous work we have proposed that the Prokushkin-Vasiliev higher spin N = 2 supergravity on AdS3 is dual to a large N limit of the N = (2,2) ℂPN Kazama- Suzuki model. There is now strong evidence supporting this proposal based on symmetry and spectrum comparison. In this paper we will give further evidence for the duality by studying correlation functions. We compute boundary three point functions with two fermionic operators and one higher spin bosonic current in terms of the bulk supergravity theory. Then we compare with the results in the dual CFT, where the supersymmetry of the theory turns out to be very helpful. In particular we use it to confirm results conjectured in the bosonic case. Moreover, correlators with a fermionic current can be obtained via supersymmetry. © 2013 SISSA, Trieste, Italy. [less ▲]

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See detailExtended higher spin holography and Grassmannian models
Creutzig, Thomas; Hikida, Yasuaki; Roenne, Peter Browne UL

in Journal of High Energy Physics [=JHEP] (2013)

Detailed reference viewed: 34 (5 UL)
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See detailCorrespondences between WZNW models and CFTs with W-algebra symmetry
Roenne, Peter Browne UL; Creutzig, Thomas; Hikida, Yasuaki

E-print/Working paper (n.d.)

Detailed reference viewed: 31 (1 UL)