International Association for Cryptologic Research

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2012-06-12
06:17 [Pub][ePrint] A Way Reduce Signed Bitwise Differences that Transformed Into Same Modular Differences, by Xu ZiJie and Xu Ke

  We study signed bitwise differences and modular differences. We find a way to reduce signed bitwise differences that can be transformed into same modular differences. In this way, it needs arithmetic difference. We establish one-one relationship between modular differences and arithmetic difference. And establish one-one relationship between signed bitwise differences and arithmetic difference. Then it will reduce signed bitwise differences that can be transformed into same arithmetic difference. In this paper, we design a construction with ways we find. Given modular differences, some signed bitwise difference is uniquely determined.



06:17 [Pub][ePrint] Homomorphic A-codes for Network Coding, by Zhaohui Tang

  Authentication codes (A-codes) are a well studied technique to provide unconditionally secure

authentication. An A-code is defined by a map that associates a pair formed by a message and a key

to a tag. A-codes linear in the keys have been studied for application to distributed authentication

schemes. In this paper, we address the dual question, namely the study of A-codes that are linear in the

messages. This is usually an undesired property, except in the context of network coding. Regarding

these A-codes, we derive some lower bounds on security parameters when key space is known. We

also show a lower bound on key size when security parameter values are given (with some special

properties) and construct some codes meeting the bound.





2012-06-11
14:41 [Event][New] ICMLA 2012: Special Session on Machine Learning in Information and System Security

  Submission: 6 August 2012
Notification: 7 September 2012
From December 12 to December 15
Location: Boca Raton, Florida, USA
More Information: http://www.icmla-conference.org/icmla12/links/Machine_Learning_in_Information_and_System_Security_Issues.pdf


14:41 [Event][New] PQCrypto 2013: Post-Quantum Crypto 2013

  From June 4 to June 7
Location: Limoges, France


09:37 [Job][New] Security and Cryptography Researcher, Safemarket Ltd, Thessaloniki, Greece

  Safemarket Ltd., a software development and secure computer services company, seeks one Security or Cryptography specialist for participating on the research project entitled \"Secure Automated E-learning tests and Logic Puzzles\".

Requirements

  • Ph.D. in Computer Science with specialization in at least one of the following (or related) areas: Networks/Servers, Computer and Network Security, Applied Cryptography, Computer Systems.

  • Excellent knowledge on web/application server customization

  • Strong understanding (server administration) of Linux OS, preferably CentOS or Ubuntu

  • Experience in Database Security and Cryptography Policies

Desired Qualifications

  • Certifications: CISSP, CCSP, RHCE, CCNA, MCSA, Linux + Pro, CEH (Certified Ethical Hacker)

  • MySQL, PHP, Java

  • Cryptography, SSL

  • Clustered environments

  • Web / SQL Load Balancing

  • Fluency in English

  • Game/Application Servers (Glassfish)

  • Apache/Nginx/Tomcat.

  • Proved experience in network/server management and administration

This a 3-year contract research position (full 36 months) with a salary of about 2100 Euros (gross). The project is Co-financed by the European Union and Greece - Operational Program \'Human Resources Development\' - NSFR 2007-2013 - European Social Fund.

Successful applicant will lead the security group with the role of organising/administrating the whole infrastructure required for supporting secure and fair electronic contests.

Contact: Send a cover letter and a detailed CV to: jobs (at) safemarket.gr



2012-06-08
19:24 [PhD][New] Roel Peeters: Security Architecture for Things That Think

  Name: Roel Peeters
Topic: Security Architecture for Things That Think
Category: cryptographic protocols

Description: The observation that people already carry lots of personal devices (e.g., a smart phone, an electronic identity card, an access badge, an electronic car key, a laptop, ... ), serves as starting point for this thesis. Furthermore, with the arrival of smart objects, the number of things that think one carries is expected to grow. Sensors will be built into clothing and attached to the body to monitor\r\nour health. It is clear that these devices need to be protected. However, due to the vast amount of devices involved, the traditional approach of protecting\r\neach device on its own, results in a usability nightmare.\r\n
\r\nWe investigate how to tap into the potential that arises from cooperation between these devices. This is done by deploying threshold cryptography on\r\npersonal devices. Threshold cryptography has the benefit of increased overall security, since an adversary can compromise a number (up to the threshold\r\nnumber) of devices without gaining any advantage towards breaking the overall security. Furthermore, the end-user does not need to carry all his personal\r\ndevices, any subset of size at least the threshold number is sufficient to make use of the threshold security system.\r\n
\r\nWe propose technical solutions to tackle some of the practical issues related to this approach, paving the road for real world implementations. First, we\r\nshow how one can include devices that do not have the necessary (secure) storage capabilities needed to store shares (e.g., car keys) in our threshold\r\nscheme. Second, we investigate how the end-user can add or remove devices from his set of personal devices used in this threshold scheme. Finally, in\r\norder to get user acceptance, the (location) privacy of consumers should not be disregarded. Towards this goal we examine how to achieve private and\r\nsecure device authentication over an open channel. This is done specifically for RFID tags, which are the least powerful devices that can be included in our\[...]




2012-06-06
05:16 [PhD][New] U. Rajeswar Rao

  Name: U. Rajeswar Rao


05:16 [PhD][New] Rayanki Balakrishna: Multihop Performace Issuess in Wire less Mobile Ad Hoc networks

  Name: Rayanki Balakrishna
Topic: Multihop Performace Issuess in Wire less Mobile Ad Hoc networks
Category: implementation



05:15 [PhD][New] U.Rajeswar Rao

  Name: U.Rajeswar Rao




2012-06-05
20:52 [Event][Update] SPACE'12: Int. Conference on Security, Privacy and Applied Cryptography Engineering

  Submission: 3 July 2012
Notification: 17 August 2012
From November 2 to November 3
Location: Chennai, India
More Information: http://space.cse.iitm.ac.in/


18:17 [Pub][ePrint] Using Variance to Analyze Visual Cryptography Schemes, by Teng Guo and Feng Liu and ChuanKun Wu and YoungChang Hou

  A visual cryptography scheme (VCS) is a secret sharing method, for which the secret can be decoded by human eyes without needing any cryptography knowledge nor any computation. Variance is first introduced by Hou et al. in 2005 and then thoroughly verified by Liu et al. in 2012 to evaluate the visual quality of size invariant VCS. In this paper, we introduce the idea of using variance as an error-detection measurement, by which we find the security defect of Hou et al.\'s multi-pixel encoding method. On the other hand, we find that variance not only effects the visual quality of size invariant VCS, but also effects the

visual quality of VCS. At last, average contrast associated with variance is used as a new criterion to evaluate the visual quality of VCS.