IACR News
Here you can see all recent updates to the IACR webpage. These updates are also available:
06 July 2018
Huijia Lin, Christian Matt
ePrint ReportLucas Kowalczyk, Jiahui Liu, Kailash Meiyappan, Tal Malkin
ePrint ReportOsmanbey Uzunkol, Jothi Rangasamy, Lakshmi Kuppusamy
ePrint ReportAlexei Zamyatin, Dominik Harz, William J. Knottenbelt
ePrint ReportWe systematise the notion of cryptocurrency-backed tokens, an approach towards trustless blockchain interoperability. We then propose a protocol for issuing, trading, and redeeming Bitcoin-backed tokens on Ethereum. Consequently, we provide an overview of system requirements, discuss open challenges regarding performance and security, and give an outlook on possible extensions. Our protocol, which requires no modifications to Bitcoin's consensus rules, can thereby be generalised to also support other cryptocurrencies.
Rami Khalil, Arthur Gervais
ePrint ReportWe present a novel non-custodial 2nd-layer financial intermediary solution secure against double-spending that guarantees users control of funds through leveraging a smart contract enabled decentralized blockchain ledger as a means of dispute resolution. Two-party payment channels networks have been proposed as building blocks for trust-free payments that do not exhaust the resources of the blockchain; however, they bear multiple fundamental limitations. NOCUST is a specification for secure N-party payment hubs with improved transaction utility, cheaper operational costs and leaner user enrollment.
Michael Backes, Lucjan Hanzlik, Jonas Schneider
ePrint ReportWe address this issue, starting from the vantage point of the comprehensive model due to Bootle et al. (ACNS'16), who prove that any scheme secure in their model is also secure in the previous models. Their model allows for fully dynamic management of group membership by segmenting the scheme's lifetime into epochs during which group membership is static but between which users may join or leave the group.
We extend the model of Bootle et al. by introducing formal notions of membership privacy. We then propose an efficient generic construction for a fully dynamic group signature scheme with membership privacy that is based on signatures with flexible public key (SFPK) and signatures on equivalence classes (SPSEQ). We instantiate the construction using a SFPK scheme based on the bilinear decisional Diffie-Hellman assumption and SPSEQ scheme by Fuchsbauer and Gay (PKC'18). The resulting scheme provides shorter signatures than existing schemes from standard assumption, while at the same time achieving stronger security guarantees.
Masayuki Abe, Miguel Ambrona, Miyako Ohkubo, Mehdi Tibouchi
ePrint ReportLucas Schabh\"{u}ser, Denis Butin, Denise Demirel, Johanens Buchmann
ePrint ReportNirvan Tyagi, Muhammad Haris Mughees, Thomas Ristenpart, Ian Miers
ePrint ReportShuhong Gao
ePrint Report05 July 2018
The University of Auckland, New Zealand
Job PostingProject Aim
The aim of the project is to develop practical obfuscation techniques based on a theoretical foundation.
The theoretical work will be led by Prof Steven Galbraith while Associate Prof. Giovanni Russello will lead the practical aspects.
Experience
The ideal candidate will have an undergraduate degree in computer science, engineering or mathematics and have written a master thesis in some topic related to security, cryptography, or the underlying mathematics. We are looking for candidates with experience in some or all of the following:
- Hands-on experience with standard obfuscators and de-obfuscator tools
- Understanding of cryptography and its applications
- Understanding of ARM and/or X86 architecture and respective instruction set
- Experience in coding in C/C++ and assembly
- Understanding of compilers and run-time code optimisations
Application Process:
Please send an email to g.russello (at) auckland.ac.nz with a short CV and an unofficial transcript of grades in your degree.
Successful applicants will be asked to provide further information (such as an IELTS English language test and official transcripts of their degrees) at a later stage of the application process.
Closing date for applications: 2 September 2018
Contact: g.russello (at) auckland.ac.nz
The University of Auckland, New Zealand
Job PostingApplicants are required to have completed (or be close to completing) a Master degree (or equivalent) with outstanding grades in Computer Science, Mathematics, or closely related areas. Additional knowledge in related disciplines such as, e.g., complexity theory or IT security is welcome.
The candidate should be able not only to design but also implement working prototypes of the crypto scheme developed during the research period. Good knowledge of C/C++ and Linux is a must.
The STRATUS project will provide a stipend of 27,000 NZD p.a. and cover the costs of the tuition fee for 3 years.
Closing date for applications: 31 December 2018
Contact: Dr. Giovanni Russello
University of Luxembourg/ Centre for Security and Trust
Job PostingThe Applied Security and Information Assurance (APSIA) research group, headed by Prof P Y A Ryan, invites applications for two PhD and two post-doc positions, details below. The APSIA team of SnT is a dynamic and growing research group, some 20 strong, conducting research on security-critical systems, information assurance, cryptography, crypto protocols and privacy.
The Interdisciplinary Centre for Security, Reliability and Trust (SnT) carries out interdisciplinary research in secure, reliable and trustworthy ICT systems and services, often in collaboration with industrial, governmental and international partners.
The successful candidate will join the APSIA group and will be part of the joint Luxembourg National Research Fund (FNR) and Norwegian RCN project “SURCVS” and will conduct research on the design and evaluation of secure yet usable voting systems. The project will be conducted jointly with the NTNU in Oslo. The candidate will be supervised by Prof. Peter Y. A. Ryan and Dr. Peter Roenne.
The candidate’s tasks include the following:
Conducting research on the following topics in verifiable, coercion resistant voting systems:
Formal definitions of relevant properties such verifiability, privacy, receipt-freeness and coercion resistance.
Modelling complex socio-technical systems, taking account of human aspects of security and trust.
Exploring quantum-safe algorithms and everlasting privacy for voting systems.
Providing guidance to M.Sc. students
Disseminating results through scientific publications and talks at conferences
Closing date for applications: 20 July 2018
Contact: peter.ryan (at) ui.lu or peter.roenne (at) uni.lu
More information: http://emea3.mrted.ly/1vjtw
University of Luxembourg/ Centre for Security and Trust
Job PostingThe Applied Security and Information Assurance (APSIA) research group, headed by Prof P Y A Ryan, invites applications for two PhD and two post-doc positions, details below. The APSIA team of SnT is a dynamic and growing research group, some 20 strong, conducting research on security-critical systems, information assurance, cryptography, crypto protocols and privacy.
The position will be for an initial two year, but potentially extendable to five years.
See also: https://wwwen.uni.lu/snt/research/apsia/we_are_hiring
The Interdisciplinary Centre for Security, Reliability and Trust (SnT) carries out interdisciplinary research in secure, reliable and trustworthy ICT systems and services, often in collaboration with industrial, governmental and international partners.
The successful candidate will join the APSIA group led by Prof. Peter Y. A. Ryan. The candidate will be part of the joint Luxembourg National Research Fund (FNR) and Norwegian RCN project “SURCVS” and will conduct research on the design and evaluation of secure yet usable voting systems. The project will be conducted jointly with the NTNU in Oslo. The candidate’s tasks include the following:
Conducting research on the following topics in verifiable, coercion resistant voting systems:
Formal definitions of relevant properties such as verifiability, privacy, receipt-freeness and coercion resistance.
Modelling complex socio-technical systems, taking account of human aspects of security and trust.
Exploring quantum-safe algorithms and everlasting privacy for voting systems.
Coordinating research projects and delivering outputs
Collaborating with partners in the SURCVS project
Providing guidance to PhD and MSc students
Disseminating results through scientific publications
Closing date for applications: 20 July 2018
Contact: Peter.Ryan (at) uni.lu or Peter.Roenne (at) uni.lu.
More information: http://emea3.mrted.ly/1vjs5
Information Assurance Platform (IAP)
Job PostingThis position is available full time or part time, on a work remotely basis (telecommuting).
The position is focused on computational integrity and privacy systems for providing tools to enhance corporate and organisational transparency with data privacy and confidentiality.
Applicants should be familiar with cutting edge scalable computational integrity and privacy research and other systems of CIP such as PCP, LPCP, MPC, KOE based systems, CLP, pairing based systems (KOE or otherwise), IP, IVC, and the state of the art including zero knowledge proofs as applicable.
The position is not required to invent, recreate or improve existing cryptography; rather, to research, understand, explain and translate, and knowledge transfer to other positions within the company for practical use in applications.
All applicants are welcome.
Closing date for applications: 30 December 2018
Contact: Please share your professional details to team [at] iap.network. All information held in strictest confidence.
More information: https://iap.network
03 July 2018
Daode Zhang, Kai Zhang, Bao Li, Xianhui Lu, Haiyang Xue, Jie Li
ePrint ReportTomer Ashur, Raluca Posteuca
ePrint Report29 June 2018
Kos, Greece, 16 September - 21 September 2018
Event CalendarTel Aviv, Israel, 17 June - 20 June 2019
Event CalendarSubmission deadline: 28 February 2019
Taipei, Taiwan , 4 December - 7 December 2018
Event CalendarSubmission deadline: 30 June 2018
Notification: 15 August 2018