Speaker                  

Prof. Alessandro Piva                  

University of Florence, Italy                  

Topic                  

Advances on Multimedia Forensics                  

Abstract                  

When observing a visual content on a web site, often people do not realize that such media have undergone a long series of transformations before appearing in their current form. In particular, the authenticity of visual contents is often overestimated: just by looking around, it is evident that creating fake digital contents is very common today, since many commercial and open-source software allow to inexpert users editing images and videos in a few minutes.                  

Multimedia forensics is a relatively new discipline that seeks to demonstrate the authenticity of a given multimedia content: the basic idea behind it is that any processing applied to a digital content leaves subtle traces, that can be analyzed to uncover the digital history of the object.                  

In the first part of the talk, a general introduction to the field of multimedia forensics will be given. Then, the most useful traces that can be used for image tampering detection, and the main forensic techniques that are based on them, will be described. Due to the ubiquitous diffusion of compressed images, major focus will be given to traces relying on specific properties of the compression process.                  

Biography                  

Alessandro Piva is Associate Professor at the Department of Information Engineering of the University of Florence, and lecturer for the course “Image Processing and Protection” of the Laurea Degree in Telecommunications Engineering of the University of Florence. He is also Head of Forlab, the Laboratory of Forensic Sciences of the University of Florence.                  

Alessandro Piva received his Ph.D. degree in “Computer Science and Telecommunications Engineering” from the University of Florence on 1999. From 2002 until 2004 he was Research Scientist at the National Inter-university Consortium for Telecommunications (CNIT). Since 2005 he was Assistant Professor at the University of Florence, and since 2014 he is Associate Professor.                  

His research interests lie in the areas of Information Forensics and Security, and of Image and Video Processing. In the first topic, he was interested in data hiding, signal processing in the encrypted domain, image and video forensic techniques. In the second area, he was interested in the design of techniques for Cultural Heritage, medical and industrial applications. In the above research topics he has been co-author of more than 40 papers published in international journals and 100 papers published in international conference proceedings. He holds 3 Italian patents and an International one on watermarking.                  

He is IEEE Senior Member, and he was IEEE Information Forensics and Security TC Member; he serves as Associate Editor of the IEEE Trans. on Multimedia, IEEE Trans. on Dependable and Secure Computing, and of the EURASIP Journal on Information Security, and he served as AE of the IEEE Trans. on Information Forensics and Security and of the IEEE Trans. on Circuits and Systems for Video Technology.                  

He was Technical Co-Chair of IEEE MMSP2004 and of IH&MMSec2014, Publications Chair of IEEE WIFS 2013, and Publications Co-Chair of IEEE ICASSP2014. He also was Co-Organizer of the First IEEE SPS Italy Chapter Summer School on Signal Processing, held on 2013, and co-Organizer of the First IEEE IFS-TC Image Forensics Challenge. He was Keynote Speaker at Tenth International Conference on Intelligent Information Hiding and Multimedia Signal Processing, 2014 and at 14th International Workshop on Digital-forensics and Watermarking (IWDW 2015).                  

 

Speaker                  

Prof. Zhiyong Liu,                  

The Institute of Computing Technology, Chinese Academy of Sciences, Beijing, China                  

Topic                  

Energy Efficiency for Cloud Computing and Data Centers                  

Abstract                  

With the wide spread usage of cloud computing and big data applications, data centers and their applications are rapidly proliferated. At the same time, the energy consumed by the data centers and corresponding networks is also increased rapidly. Energy consumption has been a challenging problem for the further development of network and data center systems, and become an important factor for a big damage to the environment. Thus the energy consumption problem becomes a major concern for both data center design, management, and applications. Energy efficient computing has attracted a great deal of research effort. In this talk, I will report some progress on energy efficiency for data centers and networks. My talk will focus on the aspect of resource management and job schedule. I will report some theoretical results for energy efficient algorithm design, introduce some resource distribution and job assignment problem with corresponding algorithm design for reducing energy consumption in data centers, and describe a distributed energy efficient routing scheme as well as its implementation for large scale networks. In the talk, I will discuss formal models and theoretical bounds for the problems, the algorithms with their complexity analysis, and implementation schemes and mechanism design.                  

Biography                  

Prof. Zhiyong Liu received his Ph.D. Degree in Computer Science from the Institute of Computing Technology (ICT), Chinese Academy of Sciences (CAS), Beijing China, in 1987, and worked as a Professor in the Institute of Computing Technology since 1987. He was the Executive Director General of the Directorate for Information Sciences, National Natural Science Foundation of China, from 1995 to 2006. He is now a Chair Professor in the Advanced Research Laboratory, ICT, CAS. He published more than two hundred papers on academic journals and conferences, as well as a number of articles on technical review, science policy, and administration. He received a China National Science Conference Award. He served as Board Member, Referee, Editor/Associate Editor in Chief, and Invited Editor for some journals, Steering/Program/Organization Committee Member/Chairman for a number of national and international conferences, Advisory/Expert Committee Member/Chairman for a number of national research initiatives, and Principal Investigator for a number of research projects. His research interests include computer architectures, algorithms, distributed and parallel computing, networks, and bioinformatics.