International Association for Cryptologic Research

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2013-12-11
12:10 [Job][New] Research Assistent, Institute for Security in Information Technology, Technische Universitaet Muenchen; Munich (Germany)

  We are part of the electrical engineering and information technology department at TUM. We develop new technologies, to counteract new threats in hardware security. Due to the increasing complexity of integrated and embedded systems, designing tools to support the hardware design of such secure devices is a challenging task and in our focus. Also research on PUFs and architectures for secure embedded systems is carried out at our Institute. To ensure security in the long term we research new attacks on secure elements.

To advance the Development of Tools for the Design of Secure Embedded Systems, we are searching for the closest possible point in time a

Research Assistant (m/f)

for a full time position.

Your Tasks:

  • Participation in industry-related research projects with focus on development and implementation of new approaches and tools to support designers in the design of secure embedded systems.
  • Tutor for labs and/or lectures

You:

  • finished your master’s degree in Electrical Engineering or Computer Sciences or equivalent with outstanding grades.
  • have strong focus on security.
  • are autonomous, can work in teams and are highly motivated.
  • like to work with students.
  • should have practical or theoretical previous knowledge on embedded systems and/or circuit design. You are also experienced in programming and have good mathematical skills.

We offer

a position as research assistant which includes the ability to carry out a PhD thesis. With your research, you contribute to one of our main fields.

The position as research assistant is initially offered for a limited time of 2.5 years. It is paid according to TV-L E13.

TUM aims at increasing the percentage of women. Therefore, qualified women

05:43 [Job][New] Assistant Professor, Simon Fraser University, Burnaby, Canada, North America

  Department of Mathematics at Simon Fraser University invites applications for up to two tenure-track positions at the Assistant Professor level starting September 1, 2014.

For one of the positions we welcome applications from researchers working in algebra or geometry, especially in subareas that complement the expertise of our current faculty. Application areas of particular interest are cryptography, communication and computation.



2013-12-10
06:42 [Job][New] Post-Doctoral Position in Systems Security, Network Security, Cryptography or Tech Policy, Boston University, Boston, MA, USA

 

A university-funded post-doc position is available in the RISCS center and the BU Security Group (BUsec), in the Department of Computer Science at Boston University. The successful candidates will have an established research track record in one or more of the following areas: systems security, network security, applied cryptography, or cybersecurity technology policy or law. The position is funded for one year, with an option to extend to two years based on performance and availability of funds. Tentative start date is September 2014, but earlier start dates are also possible.

The BU Security Group does research in cryptography and security within the Department of Computer Science. The BU Center for Reliable Information Systems & Cyber Security (RISCS) takes a multidisciplinary approach to security by bring together experts across several discipline. Both the group and the Center also benefit from collaboration with the vibrant cryptography, security, and tech policy community in the Boston area.



2013-12-09
17:51 [Event][New] IEEE IoT Journal, Special Issue on Security for IoT: the State of the Art

  Submission: 15 February 2014
Notification: 15 May 2014
From October 1 to October 15
More Information: http://iot-journal.weebly.com/uploads/1/8/8/0/18809834/ieee_iot_journal_si_iot_security_cfp.pdf


16:12 [Job][New] Digital Security Expert, Philips Research, Eindhoven, the Netherlands

  Philips Research in Eindhoven NL) is searching for a Digital Security Expert. Please visit the Philips career website for the full vacancy description.

Your Responsibilities

Most of our products are becoming connected to the cyber space. We are looking for top scientists with a strong mathematical background for strengthening our competences in digital cryptography and security and who can help us to build and offer competitive trusted solutions and services in Healthcare, Lifestyle and Lighting.

Your challenges and responsibilities will be:

- Inventing and validating in industrial project teams new digital security technologies for use in Philips products and services, making use of the Internet of Things and Cloud Computing;

- Creating innovation impact with your results in terms of intellectual property creation or research transfers into the business;

- Keeping our digital security competence at world-class level;

- Contributing to our research roadmap by new ideas and winning new proposals;

- Working together with external partners.

Your Team

For more insights you can visit: http://www.research.philips.com/

We are looking for

The successful candidate has/is:

- A PhD in mathematics or computer science and a strong inclination to cryptography, preferably proven by relevant scientific results;

- Proven practical skills in computer simulation, system architecting and computer programming;

- Practical experiences in industry;

- A strong team playing attitude, expressed in taking the lead where appropriate, building on each other’s strengths and working in a cooperative way;

- A self-propelled enthusiast with a can-do mentality.Takes ownership for making it happen;

- Good communication skills and fluent in English.



2013-12-06
22:17 [Pub][ePrint] Distributed Key Generation for Secure Encrypted Deduplication, by Yitao Duan

  Large-scale storage systems often attempt to achieve two seemingly conflicting goals: (1) the systems need to reduce the copies of redundant data to save space, a process called deduplication; and (2) users demand encryption of their data to ensure privacy. Conventional encryption makes deduplication on ciphertexts ineffective, as it destroys data redundancy. A line of work, originated from Convergent

Encryption [28], and evolved into Message Locked Encryption [12], strives to solve this problem. The latest work, DupLESS [11], proposes a server-aided architecture that provides the strongest privacy. The DupLESS architecture relies on a key server to help the clients generate encryption keys that result in convergent ciphertexts. In this paper, we first provide a rigorous proof of security, in the random oracle model, for the DupLESS architecture which is lacking in the original paper. Our proof shows that using additional secret, other than the data itself, for generating encryption keys achieves the best possible security under current deduplication paradigm.We then introduce a distributed protocol that eliminates the need for a key server and allows less managed systems such as P2P systems to enjoy the high security level. Implementation and evaluation show that the scheme is both robust and practical.



22:17 [Pub][ePrint] Differential Indistinguishability for Cryptographic Primitives with Imperfect Randomness, by Michael Backes and Aniket Kate and Sebastian Meiser and Tim Ruffing

  Indistinguishability-based definitions of cryptographic primitives such as encryption, commitments, and zero-knowledge proofs are proven to be impossible to realize in scenarios where parties only have access to non-extractable sources of randomness (Dodis et al., FOCS 2004). In this work we demonstrate that it is, nevertheless, possible to quantify this secrecy loss for non-extractable sources such as the (well-studied) Santha-Vazirani (SV) sources. In particular, to establish meaningful security guarantees in scenarios where such imperfect randomness sources are used, we define and study differential indistinguishability, a generalization of indistinguishability inspired by the notion of differential privacy.

We analyze strengths and weaknesses of differential indistinguishability both individually as well as under composition, and we interpret the resulting differential security guarantees for encryption, commitments, and zero-knowledge proofs.

Surprisingly, indistinguishability with uniform randomness carries over to differential indistinguishability with SV randomness: We show that all primitives that are secure under a traditional indistinguishibility-based definition are differentially secure when they use (a bounded amount of) SV randomness instead of uniform randomness.



22:17 [Pub][ePrint] Riding the Saddle Point: asymptotics of the capacity-achieving simple decoder for bias-based traitor tracing, by Sarah Ibrahimi and Boris Skoric and Jan-Jaap Oosterwijk

  We study the asymptotic-capacity-achieving score function that was recently proposed by Oosterwijk et al. for bias-based traitor tracing codes. For the bias function we choose the Dirichlet distribution with a cutoff. Using Bernstein\'s inequality and Bennett\'s inequality, we upper bound the false positive and false negative error probabilities. From these bounds we derive sufficient conditions for the scheme parameters. We solve these conditions in the limit of large coalition size $c_0$ and obtain asymptotic solutions for the cutoff, the sufficient code length and the corresponding accusation threshold.

The code length converges to its asymptote approximately as $c_0^{-1/2}$, which is faster than the $c_0^{-1/3}$ of Tardos\' score function.



22:17 [Pub][ePrint] Formal Analysis of CRT-RSA Vigilant\'s Countermeasure Against the BellCoRe Attack, by Pablo Rauzy and Sylvain Guilley

  In our paper at PROOFS 2013, we formally studied a few known countermeasures to protect CRT-RSA against the BellCoRe fault injection attack. However, we left Vigilant\'s countermeasure and its alleged repaired version by Coron et al. as future work, because the arithmetical framework of our tool was not sufficiently powerful. In this paper we bridge this gap and then use the same methodology to formally study both versions of the countermeasure. We obtain surprising results, which we believe demonstrate the importance of formal analysis in the field of implementation security. Indeed, the original version of Vigilant\'s countermeasure is actually broken, but not as much as Coron et al. thought it was. As a consequence, the repaired version they proposed can be simplified. It can actually be simplified even further as two of the nine modular verifications happen to be unnecessary. Fortunately, we could formally prove the simplified repaired version to be resistant to the BellCoRe attack, which was considered a \"challenging issue\" by the authors of the countermeasure themselves.



22:17 [Pub][ePrint] Constant-Round Black-Box Construction of Composable Multi-Party Computation Protocol, by Susumu Kiyoshima and Yoshifumi Manabe and Tatsuaki Okamoto

  We present the first general MPC protocol that satisfies the following: (1) the construction is black-box, (2) the protocol is universally composable in the plain model, and (3) the number of rounds is constant. The security of our protocol is proven in angel-based UC security under the assumption of the existence of one-way functions that are secure against sub-exponential-time adversaries and constant-round semi-honest oblivious transfer protocols that are secure against quasi-polynomial-time adversaries. We obtain the MPC protocol by constructing a constant-round CCA-secure commitment scheme in a black-box way under the assumption of the existence of one-way functions that are secure against sub-exponential-time adversaries. To justify the use of such a sub-exponential hardness assumption in obtaining our constant-round CCA-secure commitment scheme, we show that if black-box reductions are used, there does not exist any constant-round CCA-secure commitment scheme under any falsifiable polynomial-time hardness assumptions.



22:17 [Pub][ePrint] A Note on Bilinear Groups of a Large Composite Order, by Zhengjun Cao and Lihua Liu

  We remark that the structure of bilinear groups of a large composite order(at least 1024 bits) could make group operation inefficient and lose the advantages of elliptic curve cryptography which gained mainly from smaller parameter size. As of 2013, the longest parameter recommended by NIST for elliptic curves has 571 bits.

From the practical point of view, such an algebraic structure is unlikely applicable to cryptographic schemes.