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Transitioning to a Quantum-Resistant Public Key Infrastructure [chapter]

Nina Bindel, Udyani Herath, Matthew McKague, Douglas Stebila
2017 Lecture Notes in Computer Science  
To ensure uninterrupted cryptographic security, it is important to begin planning the transition to post-quantum cryptography. In addition to creating post-quantum primitives, we must also plan how to adapt the cryptographic infrastructure for the transition, especially in scenarios such as public key infrastructures (PKIs) with many participants. The use of hybrids-multiple algorithms in parallel-will likely play a role during the transition for two reasons: "hedging our bets" when the
more » ... s" when the security of newer primitives is not yet certain but the security of older primitives is already in question; and to achieve security and functionality both in post-quantum-aware and in a backwards-compatible way with not-yet-upgraded software. In this paper, we investigate the use of hybrid digital signature schemes. We consider several methods for combining signature schemes, and give conditions on when the resulting hybrid signature scheme is unforgeable. Additionally we address a new notion about the inability of an adversary to separate a hybrid signature into its components. For both unforgeability and non-separability, we give a novel security hierarchy based on how quantum the attack is. We then turn to three real-world standards involving digital signatures and PKI: certificates (X.509), secure channels (TLS), and email (S/MIME). We identify possible approaches to supporting hybrid signatures in these standards while retaining backwards compatibility, which we test in popular cryptographic libraries and implementations, noting especially the inability of some software to handle larger certificates.
doi:10.1007/978-3-319-59879-6_22 fatcat:ymxug5gmyzhw5fsgeehpx2no3u

An Efficient Lattice-Based Signature Scheme with Provably Secure Instantiation [chapter]

Sedat Akleylek, Nina Bindel, Johannes Buchmann, Juliane Krämer, Giorgia Azzurra Marson
2016 Lecture Notes in Computer Science  
It can be found under https://www.cdc.informatik.tu-darmstadt.de/cdc/ personen/nina-bindel. [?,?,?] .  ... 
doi:10.1007/978-3-319-31517-1_3 fatcat:olcpz626wbglvhqaamk2ix7ngu

X.509-Compliant Hybrid Certificates for the Post-Quantum Transition

Nina Bindel, Johannes Braun, Luca Gladiator, Tobias Stöckert, Johannes Wirth
2019 Journal of Open Source Software  
For example, a prior mock-up implementation was used by Bindel et al.  ...  Hybrid certificates Hybrid certificates (Bindel et al., 2017) are the basis for the use of hybrid cryptography.  ... 
doi:10.21105/joss.01606 fatcat:zbxrm345szfzrggdwj5gckk7ge

Revisiting TESLA in the Quantum Random Oracle Model [chapter]

Erdem Alkim, Nina Bindel, Johannes Buchmann, Özgür Dagdelen, Edward Eaton, Gus Gutoski, Juliane Krämer, Filip Pawlega
2017 Lecture Notes in Computer Science  
Markus Schmidt and Nina Bindel. Estimation of the Hardness of the Learning with Errors Problem with a Restricted Number of Samples. Cryptology ePrint Archive, Report 2017/140, 2017. 58.  ...  This scheme was subsequently studied by Alkim, Bindel, Buchmann, Dagdelen, and Schwabe under the name TESLA [4] , who provided an alternate security reduction from the LWE problem only.  ... 
doi:10.1007/978-3-319-59879-6_9 fatcat:qd3gs6qknban5jbkq2fq45fz6i

A cost minimisation analysis in teledermatology: model-based approach

Nina Eminović, Marcel G Dijkgraaf, Rosanne M Berghout, Astrid H Prins, Patrick JE Bindels, Nicolette F de Keizer
2010 BMC Health Services Research  
Although store-and-forward teledermatology is increasingly becoming popular, evidence on its effects on efficiency and costs is lacking. The aim of this study, performed in addition to a clustered randomised trial, was to investigate to what extent and under which conditions store-and-forward teledermatology can reduce costs from a societal perspective. Methods: A cost minimisation study design (a model based approach) was applied to compare teledermatology and conventional process costs per
more » ... rocess costs per dermatology patient care episode. Regarding the societal perspective, total mean costs of investment, general practitioner, dermatologists, out-of-pocket expenses and employer costs were calculated. Uncertainty analysis was performed using Monte Carlo simulation with 31 distributions in the used cost model. Scenario analysis was performed using one-way and two-way sensitivity analyses with the following variables: the patient travel distance to physician and dermatologist, the duration of teleconsultation activities, and the proportion of preventable consultations. Results: Total mean costs of teledermatology process were €387 (95%CI, 281 to 502.5), while the total mean costs of conventional process costs were €354.0 (95%CI, 228.0 to 484.0). The total mean difference between the processes was €32.5 (95%CI, -29.0 to 74.7). Savings by teledermatology can be achieved if the distance to a dermatologist is larger (> = 75 km) or when more consultations (> = 37%) can be prevented due to teledermatology.
doi:10.1186/1472-6963-10-251 pmid:20738871 pmcid:PMC2940879 fatcat:boy2ot3ksjgqzmjmnr4ycfnu74

Estimation of the hardness of the learning with errors problem with a restricted number of samples

Nina Bindel, Johannes Buchmann, Florian Göpfert, Markus Schmidt
2018 Journal of Mathematical Cryptology  
Bindel et al., Estimation of the LWE hardness Exhaustive search and meet-in-the-middle attacks are not discussed in Section 4 but they are adapted and implemented in our software.3 Coded-BKW, search-BKW  ... 
doi:10.1515/jmc-2017-0040 fatcat:tm6itkwkv5fgxnm76dfsyn3vta

Teledermatologic Consultation and Reduction in Referrals to Dermatologists

Nina Eminović, Nicolette F. de Keizer, Jeremy C. Wyatt, Gerben ter Riet, Niels Peek, Henk C. van Weert, Carla A. Bruijnzeel-Koomen, Patrick J. E. Bindels
2009 Archives of Dermatology  
Correspondence: Nina Eminović, PhD, Department of Medical Informatics, Academic Medical Centre, PO Box 22660, 1100 DD Amsterdam, the Netherlands (n.eminovic @gmail.com).  ...  Study concept and design: Eminović, Wyatt, ter Riet, van Weert, Bruijnzeel-Koomen, and Bindels.  ... 
doi:10.1001/archdermatol.2009.44 pmid:19451500 fatcat:lb7m3ce2i5gcpf3b7hzlkyifaa

Bounding the Cache-Side-Channel Leakage of Lattice-Based Signature Schemes Using Program Semantics [chapter]

Nina Bindel, Johannes Buchmann, Juliane Krämer, Heiko Mantel, Johannes Schickel, Alexandra Weber
2018 Lecture Notes in Computer Science  
In contrast to classical signature schemes, such as RSA or ECDSA signatures, the latticebased signature scheme ring-TESLA is expected to be resistant even against quantum adversaries. Due to a recent key recovery from a lattice-based implementation, it becomes clear that cache side channels are a serious threat for lattice-based implementations. In this article, we analyze an existing implementation of ring-TESLA against cache side channels. To reduce the effort for manual code inspection, we
more » ... de inspection, we selectively employ automated program analysis. The leakage bounds we compute with program analysis are sound overapproximations of cacheside-channel leakage. We detect four cache-side-channel vulnerabilities in the implementation of ring-TESLA. Since two vulnerabilities occur in implementations of techniques common to lattice-based schemes, they are also interesting beyond ring-TESLA. Finally, we show how the detected vulnerabilities can be mitigated effectively.
doi:10.1007/978-3-319-75650-9_15 fatcat:iywj6552b5ddfbgxqsvcufuq2e

Parameterized Hardware Accelerators for Lattice-Based Cryptography and Their Application to the HW/SW Co-Design of qTESLA

Wen Wang, Shanquan Tian, Bernhard Jungk, Nina Bindel, Patrick Longa, Jakub Szefer
2020 Transactions on Cryptographic Hardware and Embedded Systems  
Nina Bindel was supported by the NSERC Discovery Accelerator Supplement grant RGPIN-2016-05146. This work was supported in part by the Institute for Quantum Computing  ... 
doi:10.13154/tches.v2020.i3.269-306 dblp:journals/tches/WangTJBLS20 fatcat:ztxzwdv3jvenfa7p7mhkxolyye

Transcription factor HNF1β regulates expression of the calcium-sensing receptor in the thick ascending limb of the kidney

Andreas Kompatscher, Jeroen H. F. de Baaij, Karam Aboudehen, Shayan Farahani, Lex H. J. van Son, Susanne Milatz, Nina Himmerkus, Gertjan C. Veenstra, René J. M. Bindels, Joost G. J. Hoenderop
2018 AJP - Renal Physiology  
Kompatscher A, de Baaij JH, Aboudehen K, Farahani S, van Son LH, Milatz S, Himmerkus N, Veenstra GC, Bindels RJ, Hoenderop JG.  ... 
doi:10.1152/ajprenal.00601.2017 pmid:29561186 fatcat:6u5xfqtfordipfkqz7ztcxyd4i

Forschung und Praxis des Kinder- und Jugendsports im Dialog

Jan Holze, Nils Neuber, Peter Lautenbach
2020 Forum Kinder- und Jugendsport  
Tim Bindel und Christian Theis befassen sich in einer ethnografischen (Selbst-)Studie mit den bestimmenden Merkmalen der aktuellen Fitnesskultur junger Menschen.  ...  Dennis Dreiskämper, Till Utesch, Lena Henning, Nina Ferrari, Christine Graf, Maike Tietjens und Roland Naul stellen eine aktuelle Studie zum Zusammenhang von motorischer Leistungsfähigkeit, körperbezogenem  ... 
doi:10.1007/s43594-020-00004-7 fatcat:unhxlbjarzb6rk6c6dpi42uwvq

El feminismo de la gobernanza en la CEDAW: la cuestión sobre el trabajo sexual y la prostitución*

Felipe JARAMILLO RUIZ, Lina-María CÉSPEDES-BÁEZ
2020 Cadernos Pagu  
tráfico sexual que debe ser abolida por medio de la criminalización de todos aquellos que la hacen posible y la protección de las mujeres que se han visto forzadas a ejercerla (Halley et al., 2006; Bindel  ...  y estableció como condición para las organizaciones que aplicaran a fondos de este país relacionados con VIH/SIDA y/o en contra del tráfico sexual el no promover la legalización de la prostitución (Bindel  ... 
doi:10.1590/18094449202000590017 fatcat:e5wh2ogxvjdydduxp6jptlf6oy

Poder vestimentario y ley de prohibición del incesto: una lectura foucaultiana del ensayo fotográfico Los intocables del artista Eric Ravelo

Kira Schroeder
2016 Escena. Revista de las artes  
mundo obtienen ilegalmente 7000 riñones al año, se llevan a cabo 10,000 operaciones de mercado negro al año, y que 10% de los trasplantes de riñón a nivel mundial son posibles por la trata de órganos (Bindel  ...  La trata de niñas con propósitos sexuales incluye la prostitución y la pornografía, aunque incluye a niños y a niñas, es más prevalente con niñas, a edades tan tempranas como los 5 años.  ... 
doi:10.15517/es.v75i2.25577 fatcat:7fiymgqca5bfbcvgysgfwu33bu

Clinical aspects of a large group of adults with Angelman syndrome

Inge den Besten, Rianne F de Jong, Amber Geerts-Haages, Hennie T Bruggenwirth, Marije Koopmans, ENCORE Expertise Center for AS 18+, Alice Brooks, Ype Elgersma, Dederieke A M Festen, Marlies J Valstar
2020 American Journal of Medical Genetics. Part A  
find any relation between sleep problems and epilepsy in our cohort of adults, in accordance with Bindels-de Heus et al who could not confirm a relationship in Dutch children (Bindels-de Heus et al., 2020  ...  This study was funded by a grant from the "Nina Foundation", Rotterdam, The Netherlands. 2015 to 2018 adults with genetically confirmed AS were included in this study to investigate the natural course  ... 
doi:10.1002/ajmg.a.61940 pmid:33108066 fatcat:puoynxe5ufag7owydrdfyvripq

Page 360 of Kongo-Overzee Vol. 18, Issue 4 [page]

Kongo-Overzee  
In het enkelvoud heeft men : ünä wä-mwami, nina wä-mwami.  ...  Begint de naam van de bezitter met een klinker, dan valt het bindelement -a- als klank bij het possessief-prefix weg. Het prefix verliest daardoor zijn syllabisch karakter.  ... 
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