International Association for Cryptologic Research

IACR News Central

Get an update on changes of the IACR web-page here. For questions, contact newsletter (at) You can also receive updates via:

To receive your credentials via mail again, please click here.

You can also access the full news archive.

Further sources to find out about changes are CryptoDB, ePrint RSS, ePrint Web, Event calender (iCal).

15:15 [Event][New] Crypto: tentative: Crypto 2015

  From August 16 to August 20
Location: Santa Barbara, USA
More Information:

09:17 [Pub][ePrint] Fast GPGPU-Based Elliptic Curve Scalar Multiplication, by Eric M. Mahé and Jean-Marie Chauvet

  This paper presents a fast implementation to compute the scalar multiplication of elliptic curve points based on a ``General-Purpose computing on Graphics Processing Units\'\' (GPGPU) approach. A GPU implementation using Dan Bernstein\'s Curve25519, an elliptic curve over a 255-bit prime field complying with the new 128-bit security level, computes the scalar multiplication in less than a microsecond on AMD\'s R9 290X GPU. The presented methods and implementation considerations can be applied to any parallel architecture.

21:02 [News] Scott Vanstone (1947-2014)

  Scott Vanstone (1947-2014)

20:30 [Event][New] CARDIS 2014: 13th Smart Card Research and Advanced Application Conference

  Submission: 27 June 2014
From November 5 to November 7
Location: Paris, France
More Information:

20:19 [News] President's letter


It is a great honor for me to have been elected as the President of the IACR and a challenge at the same time. Today cryptography is a vibrant research field that offers important and exciting questions to work on. It has not lost any of its fascination to me over the last 20 years since I entered the field as a graduate student -- quite to the contrary. In the age of cloud computing, cryptology continues to be a key technology for securing the digital world. Starting with the Snowden revelations in 2013, cryptography has also regained a level of political visibility that reminds me of the debates that were taking place in the 1990's. This gives us, as cryptologists and members of the IACR, an exposure that is hard to match.

In 2013 cryptology demonstrated (again) the power of its contributions to society, science, and technology by Shafi Goldwasser and Silvio Micali winning the ACM Turing Award, the highest distinction in computer science. As the ACM Turing Award page shows very visibly (, cryptology is one of the most promising research topics for winning the Turing Award. Congratulations, Shafi and Silvio!

The IACR's events were well-attended and well-organized in 2013. The first two of our 2014 events, TCC in San Diego and FSE in London, are already over with about 120 and about 160 attendees, respectively. For the upcoming Eurocrypt in Copenhagen, everyone is advised to book early. Due to Eurovision Song Contest 2014 in the week just before Eurocrypt, hotels may be difficult to find or expensive.

The composition of the Board of Directors has changed for 2014. New members of the Board are: Ivan Damgaard, as new JoC Editor-in-Chief; Steven Galbraith, Asiacrypt 2015 General Chair; Svetla Petkova-Nikova, Eurocrypt 2015 General Chair; and Thomas Ristenpart, Crypto 2015 General Chair. Matt Franklin will stay on the Board in 2014 for easing the transition of the Journal to Ivan Damgaard.

IACR exists only through the work of volunteers, who bring our conferences, events, online systems, and publications to life. I'd like to thank everyone for contributing their time to IACR. It is hard work but important for our organization. At the same time, I am looking forward to hearing about your future plans and ideas for how you would like to help and to improve IACR.

Very concretely, the European members of the Board of Directors are currently looking for a proposal to host Eurocrypt 2016. If you are inclined and would like to know more about exposing your skills as a conference organizer, please step forward and contact Michel Abdalla or any other member of the Board.

For 2014 and beyond, the IACR will have to address the challenges to scientific publishing posed by two factors, by the Internet and by the growing field. The IACR has a long tradition of operating with a liberal, author-friendly attitude to copyright. This has made it possible, among other things, that all IACR publications starting from 1982 are now openly available over the Internet via the IACR website; only the last two years are restricted to IACR members. Second, the growth in our field has boosted the number of paper submissions and conference attendees, but also led to record low acceptance rates and excessive reviewing load. We will resume the open discussion on the future of IACR's publications, in order to address these challenges.

With my new role as President, I have to cut back on other ends. I am glad that Nigel Smart has taken over my job as co-editor of the Cryptology ePrint Archive, or "eprint" as called by most. He shares this workload with Tal Rabin. Almost 15 years ago, when I had created the online system that still runs today, it had not occurred to me that the eprint archive would ever play such a useful role for research in cryptology.

Shortly before writing this, the sad news reached us that Scott Vanstone has passed away on March 2nd. He was a giant in the field, and the IACR will honor his contributions separately. Let me only mention that he was a past Director of the IACR and had helped to grow the organization, and he became an IACR Fellow in 2011.

I look forward to interacting with you in 2014.

Christian Cachin
IACR President

This letter had stated erroneously that Scott Vanstone was past President of the IACR; in fact, he was a member of the Board of Directors.

15:17 [Pub][ePrint] Crypto-Multimedia, by Benlcouiri Younes and Azizi Abdelmalek and Moulay Chrif Ismaili

  This paper is structured on securing of storage, transmission and the traceability of digital images. It consists in the design of the cryptographic algorithms appropriate to the case of fixed and moving images.

In this sense, we have introduced two approaches that is different in the synthesis of confusion and diffusion on using the principles of substitu-tion and/or transposition to secure JPEG and MPEG format.

15:17 [Pub][ePrint] Breaking POET Authentication with a Single Query, by Jian Guo and Jérémy Jean and Thomas Peyrin and Wang Lei

  In this short article, we describe a very practical and simple attack on the authentication part of POET authenticated encryption mode proposed at FSE 2014. POET is a provably secure scheme that was designed to resist various attacks where the adversary is allowed to repeat the nonce, or even when the message is output before verifying the validity of the tag when querying the decryption oracle. However, we demonstrate that using only a single encryption query and a negligible amount of computations, even without any special misuse from the attacker, it is possible to generate many valid ciphertext/tag pairs for POET. Our work shows that one should not use POET for any application where authentication property is required. Furthermore, we propose a possible patch to overcome this particular issue, yet without backing up this patch with a security proof.

21:17 [Pub][ePrint] Cryptanalysis and Security Enhancement of Two Advanced Authentication Protocols, by Sai Raghu Talluri and Swapnoneel Roy

  In this work we consider two protocols for performing cryptanalysis and security enhancement. The first one by Jiang et al., is a password-based authentication scheme which does not use smart cards. We note that this scheme is an improvement over Chen et al.\'s scheme shown vulnerable to the off-line dictionary attack by Jiang et al. We perform a cryptanalysis on Jiang at al.\'s improved protocol and observe that it is prone to the clogging attack, a kind of denial of service (DoS) attack. We then suggest an improvement on the protocol to prevent the clogging attack.

The other protocol we consider for analysis is by Wang et al. This is a smart card based authentication protocol. We again perform the clogging (DoS) attack on this protocol via replay. We observe that all smart card based authentication protocols which precede the one by Wang et al., and require the server to compute the computationally

intensive modular exponentiation are prone to the clogging attack. We suggest (another) improvement on the protocol to prevent the clogging attack, which also applies to the protocol by Jiang et. al.

21:17 [Pub][ePrint] Low Overhead Broadcast Encryption from Multilinear Maps, by Dan Boneh and Brent Waters and Mark Zhandry

  We use multilinear maps to provide a solution to the long-standing problem of public-key broadcast encryption where all parameters in the system are small. In our constructions, ciphertext overhead, private key size, and public key size are all poly-logarithmic in the total number of users. The systems are fully secure against any number of colluders. All our systems are based on an O(logN)-way multilinear map to support a broadcast system for N users. We present three constructions based on different types of multilinear maps and providing different security guarantees. Our systems naturally give identity-based broadcast systems with short parameters.

18:14 [Event][New] ESORICS 2014: 19th European Symposium on Research in Computer Security

  Submission: 2 April 2014
Notification: 10 June 2014
From September 7 to September 11
Location: Wroclaw, Poland
More Information: