Prof. Dr. Nicolas Sklavos
Associate Professor, SCYTALE Group, Computer Engineering and Informatics Department, University of Patras, Greece
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Academic Career Length
27Years (2000-Present)
(Calculated once Scilit publication data is synced: current year − year of first publication + 1)
Representative Publications
View All Publications1 March 2011 in Computers and Electrical Engineering
Journal Article
Rodrigo Román-Castro
Crisitna Alcaraz
Javier LopezNicolas Sklavos1 June 2021 in Internet of Things
Journal Article
22 October 2012 in IEEE Security & Privacy
Journal Article
Anastasios BikosNicolas SklavosThe authors give an overview on the state of the art of potential security issues that occur in the deployment of the LTE/SAE (Long-Term Evolution/System Architecture Evolution) protocol in emerging 4G wireless technologies. Although security concerns and challenges in wireless networks will remain a hot topic in the future, the LTE/SAE standard could adapt to these rising challenges, becoming more robust and secure. By looking at the authentication and ciphering algorithms, such as EAP-AKA (Extensible Authentication Protocol for Authentication and Key Agreement), currently operating within the LTE protocol, the authors analyze several vulnerabilities in LTE/SAE security architecture - specifically, insecure AKA key derivation procedures and the lack of fast reauthentications during handovers.
1 December 2002 in IEEE Transactions on Computers
Journal Article
Nicolas SklavosOKO. Koufopavlou
O. Koufopavlou
Two architectures and VLSI implementations of the AES Proposal, Rijndael, are presented in this paper. These alternative architectures are operated both for encryption and decryption process. They reduce the required hardware resources and achieve high-speed performance. Their design philosophy is completely different. The first uses feedback logic and reaches a throughput value equal to 259 Mbit/sec. It performs efficiently in applications with low covered area resources. The second architecture is optimized for high-speed performance using pipelined technique. Its throughput can reach 3.65 Gbit/sec.
1 March 2005 in The Journal of Supercomputing
Journal Article
Nicolas SklavosOKO. Koufopavlou
O. Koufopavlou
4 November 2003
Conference Paper
Nicolas SklavosOKO. Koufopavlou
O. Koufopavlou
Couple to the communications wired and unwired networks growth, is the increasing demand for strong secure data transmission. New cryptographic standards are developed, and new encryption algorithms are designed, in order to satisfy the special needs for security. SHA-2 is the newest powerful standard in the hash functions families. In this paper, a VLSI architecture for the SHA-2 family is proposed. For every hash function SHA-2 (256, 384, and 512) of this standard, a hardware implementation is presented. All the implementations are examined and compared in the supported security level and in the performance by using hardware terms. This work can substitute efficiently the previous SHA-1 standard implementations, in every integrity security scheme, with higher offered security level, and better performance. In addition, the proposed implementations could be applied alternatively in the integrations of digital signature algorithms, keyed-hash message authentication codes and in random numbers generators architectures.
About Me
Dr. Nicolas Sklavos is an associate professor at the Computer Engineering and Informatics Department (CEID) of the Polytechnic School of the University of Patras, Hellas. He is the director of the SCYTALE Group. His research interests include cryptographic engineering, hardware security, cyber security, digital systems design, embedded systems, and IoT. He has participated in a number of European and national research and development projects. He is an evaluator and reviewer of project proposals funded by the European Commission or national resources. He has participated in the organization of international scientific conferences of IEEE, ACM, and IFIP, fulfilling several committee duties as well as that of an editorial board member for several scientific journals. He has authored technical papers, books, chapters, reports, etc., in the areas of his research. He has been also a keynote/invited speaker for conferences, forums, summer schools, etc. His publications have received a great number of citations in the scientific and technical literature. He is a senior member of the IEEE, an ACM distinguished speaker and professional member, an associated member of HiPEAC, as well as a member of the IACR.