Christos Dimitrakakis

Senior forskare at Data Science

Link to personal webpage

Source: chalmers.se

Publications

2017

DUCT: An upper confidence bound approach to distributed constraint optimization problems

Brammert Ottens, Christos Dimitrakakis, Boi Faltings
ACM Transactions on Intelligent Systems and Technology. Vol. 8 (5)
Journal article
2017

A Differentially Private Encryption Scheme

Carlo Brunetta, Christos Dimitrakakis, Bei Liang et al
Lecture Notes in Computer Science. Vol. 10599 LNCS, p. 309-326
Paper in proceedings
2017

Near-Optimal Blacklisting

Christos Dimitrakakis, Aikaterini Mitrokotsa
Computers and Security. Vol. 64 (1), p. 110-121
Journal article
2017

Thompson Sampling for Stochastic Bandits with Graph Feedback

Aristide Tossou, Christos Dimitrakakis, Devdatt Dubhashi
31st AAAI Conference on Artificial Intelligence, AAAI 2017, San Francisco, United States, 4-10 February 2017, p. 2660-2666
Paper in proceedings
2017

Achieving Privacy in the Adversarial Multi-Armed Bandit

Aristide Tossou, Christos Dimitrakakis
31st AAAI Conference on Artificial Intelligence, AAAI 2017, San Francisco, United States, 4-10 February 2017, p. 2653-2659
Paper in proceedings
2017

Differential privacy for Bayesian inference through posterior sampling

Christos Dimitrakakis, B.E.N. Nelson, Zuhe Zhang et al
Journal of Machine Learning Research. Vol. 18 (1 March 2017)
Journal article
2017

Bayesian Inference for Least Squares Temporal Difference Regularization

Nikolaos Tziortztiois, Christos Dimitrakakis
ECML 2017
Paper in proceedings
2016

Optimal advertisement strategies for small and big companies

Aristide Tossou, Christos Dimitrakakis
Lecture Notes of the Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering. Vol. 171, p. 94-98
Paper in proceedings
2016

On the differential privacy of Bayesian inference

Zuhe Zhang, B. Rubinstein, Christos Dimitrakakis
30th AAAI Conference on Artificial Intelligence, AAAI 2016, Phoenix Convention CenterPhoenix, United States, 12-17 February 2016, p. 2365-2371
Paper in proceedings
2016

Synergistic user ↔ context analytics

A. Hossmann-Picu, Z. Li, Z. Zhao et al
Advances in Intelligent Systems and Computing, p. 163-172
Book chapter
2016

Algorithms for Differentially Private Multi-Armed Bandits

Aristide Tossou, Christos Dimitrakakis
30th AAAI Conference on Artificial Intelligence, AAAI 2016, Phoenix Convention CenterPhoenix, United States, 12-17 February 2016, p. 2087-2093
Paper in proceedings
2015

Foreword - Proceedings of the 8th ACM Workshop on Artificial Intelligence and Security

Christos Dimitrakakis, Aikaterini Mitrokotsa, Arunesh Sinha et al
8th ACM Workshop on Artificial Intelligence and Security, AISec 2015 - co-located with CCS 2015; Denver; United States, p. iii-
Conference contribution
2015

Expected loss analysis for authentication in constrained channels

Christos Dimitrakakis, Aikaterini Mitrokotsa, Serge Vaudenay
Journal of Computer Security. Vol. 23 (2), p. 309-329
Journal article
2015

Differentially private, multi-agent multi-armed bandits

Aristide Tossou, Christos Dimitrakakis
European Workshop on Reinforcement Learning (EWRL-15)
Paper in proceedings
2015

Distance-Bounding Protocols: Are You Close Enough?

Christos Dimitrakakis, Aikaterini Mitrokotsa
IEEE Security and Privacy. Vol. 13 (4), p. 47-51
Journal article
2014

On the Leakage of Information in Biometric Authentication

Elena Pagnin, Christos Dimitrakakis, Aysajan Abidin et al
In Proceedings of Indocrypt - 15th International Conference on Cryptology in India 2014, New Delhi, December 2014., p. 265-280
Paper in proceedings
2014

Generalised entropy MDPs and Minimax Regret

Emmanouil Androulakis, Christos Dimitrakakis
NIPS 2014, From bad models to good policies workshop.
Paper in proceedings
2014

Cover Tree Bayesian Reinforcement Learning

N. Tziortziotis, Christos Dimitrakakis, K. Blekas
Journal of Machine Learning Research. Vol. 15, p. 2313-2335
Journal article
2014

Robust and private Bayesian inference

Christos Dimitrakakis, Blaine Nelson, Aikaterini Mitrokotsa et al
Lecture Notes in Computer Science. Vol. 8776, p. 291-305
Paper in proceedings
2014

Differential Privacy and Private Bayesian Inference.

Christos Dimitrakakis, Blaine Nelson, Ben Rubinstein et al
n Proceedings of the 19th Nordic Conference on Secure IT Systems (NordSec 2014), Poster, Tromso, Norway, October 2014., p. 289-290
Conference poster
2014

Foreword - Proceedings of the ACM Conference on Computer and Communications Security

Christos Dimitrakakis, Aikaterini Mitrokotsa, B. Rubinstein et al
7th ACM Workshop Artificial Intelligence and Security, AISec 2014, Co-located with the ACM Conference on Computer and Communication Security, CCS 2014, Scottsdale, United States, 7 November 2014. Vol. 2014-November (November), p. ii-
Conference contribution
2014

The reinforcement learning competition

Christos Dimitrakakis, Nikolaos Tziortziotis
Magazine article
2014

Usable ABC reinforcement learning

Christos Dimitrakakis, Nikolaos Tziortziotis
NIPS 2014, ABC in Montreal workshop.
Conference poster
2013

Proceedings of the ACM Conference on Computer and Communications Security: Foreword

B. Nelson, Christos Dimitrakakis, E. Shi et al
6th Annual ACM Workshop on Artificial Intelligence and Security, AISec 2013, Co-located with the 20th ACM Conference on Computer and Communications Security, CCS 2013, Berlin, Germany, 4 November 2013
Conference contribution
2013

Intrusion detection in MANET using classification algorithms: The effects of cost and model selection

Aikaterini Mitrokotsa, Christos Dimitrakakis
Ad Hoc Networks. Vol. 11 (1), p. 226-237
Journal article
2013

Summary/overview for artificial intelligence and security (AISec'13)

B.E.N. Nelson, Christos Dimitrakakis, E. Shi
Proceedings of the ACM Conference on Computer and Communications Security CCS 2013; Berlin; Germany; 4 November 2013 through 8 November 2013, p. 1483-1484
Paper in proceedings
2013

Generalization and Interference in Human Motor Control

Luca Lonini, Christos Dimitrakakis, Constantin Rothkopf et al
Computational and Robotic Models of the Hierarchical Organization of Behavior, p. 155-176
Book chapter
2013

Network Self-Organization Explains the Statistics and Dynamics of Synaptic Connection Strengths in Cortex

P. Zheng, Christos Dimitrakakis, J. Triesch
PLoS Computational Biology. Vol. 9 (1)
Journal article
2013

ABC Reinforcement Learning

Christos Dimitrakakis, Nikolaos Tziortziotis
JMLR W&CP (ICML 2013). Vol. 28 (3), p. 684-692
Paper in proceedings
2013

Personalized news recommendation with context trees

Florent Garcin, Christos Dimitrakakis, Boi Faltings
ACM Recommender Systems Conference, RecSys 2013
Paper in proceedings
2013

Monte-Carlo utility estimates for Bayesian reinforcement learning

Christos Dimitrakakis
Proceedings of the IEEE Conference on Decision and Control, p. 7303-7308
Paper in proceedings
2013

Linear Bayesian reinforcement learning

Nikolaos Tziortziotis, Christos Dimitrakakis, Konstantinos Blekas
IJCAI 2013, Proceedings of the 23rd International Joint Conference on Artificial Intelligence
Paper in proceedings
2013

Probabilistic inverse reinforcement learning in unknown environments

Aristide Tossou, Christos Dimitrakakis
Conference on Uncertainty in Artificial Intelligence, UAI 2013
Paper in proceedings
2013

On selecting the nonce length in distance bounding protocols

Aikaterini Mitrokotsa, Pedro Periz-Lopez, Christos Dimitrakakis et al
Computer Journal
Journal article
2012

Near-optimal Node Blacklisting in Adversarial Networks

Christos Dimitrakakis, Aikaterini Mitrokotsa
Conference on Decision and Game Theory for Security, GameSec 2012
Conference poster
2012

Guest editors' introduction: Special section on learning, games, and security

Christos Dimitrakakis, T. Karygiannis, Aikaterini Mitrokotsa
IEEE Transactions on Dependable and Secure Computing. Vol. 9 (4), p. 449-450
Magazine article
2012

DUCT: An Upper Confidence Bound Approach to Distributed Constraint Optimization Problems

Brammert Ottens, Christos Dimitrakakis, Boi Faltings
Conference on Artificial Ingelligence, AAAI 2012
Paper in proceedings
2012

Expected loss bounds for authentication in constrained channels

Christos Dimitrakakis, Aikaterini Mitrokotsa, S. Vaudenay
Proceedings - IEEE INFOCOM 2012, p. 478-485
Paper in proceedings
2012

Sparse reward processes

Christos Dimitrakakis
Report
2011

Robust Bayesian reinforcement learning through tight lower bounds

Christos Dimitrakakis
EWRL 2011
Paper in proceedings
2011

Preference elicitation and inverse reinforcement learning

C.A. Rothkopf, Christos Dimitrakakis
Machine Learning and Knowledge Discovery in Databases, ECML 2011
Paper in proceedings
2011

Network Self-organization Explains the Distribution of Synaptic Efficacies in Neocortex

Pengsheng Zhang, Christos Dimitrakakis, Jochen Triesch
Proceedings of DevLeaNN: A Workshop on Development and Learning in Artificial Neural Networks
Conference poster
2011

Bayesian multitask inverse reinforcement learning

Christos Dimitrakakis, Constantin Rothkopf
EWRL 2011
Paper in proceedings
2011

Phoneme and sentence-level ensembles for speech recognition

Christos Dimitrakakis, S. Bengio
Eurasip Journal on Audio, Speech, and Music Processing. Vol. 2011
Journal article
2010

Context model inference for large or partially observable MDPs

Christos Dimitrakakis
ICML Workshop on reinforcement learning and search in very large spaces
Conference poster
2010

Reid et al.'s distance bounding protocol and mafia fraud attacks over noisy channels

Aikaterini Mitrokotsa, Christos Dimitrakakis, P. Peris-Lopez et al
IEEE Communications Letters. Vol. 14 (2), p. 121-123
Journal article
2010

Proceedings of the 1st International ECML/PKDD Workshop on Privacy and Security Issues in Data Mining and Machine Learning (PSDML 2010)

Christos Dimitrakakis, Aris Gkoulalas-Divanis, Aikaterini Mitrokotsa et al
Edited book
2010

Bayesian variable order Markov models

Christos Dimitrakakis
AI-STATS 2010
Paper in proceedings
2010

Complexity of stochastic branch and bound methods for belief tree search in Bayesian reinforcement learning.

Christos Dimitrakakis
International conference on Agents and Artificial intelligence (ICAART 2010),
Paper in proceedings
2009

Intrusion detection using cost-sensitive classification

Aikaterini Mitrokotsa, Christos Dimitrakakis, C. Douligeris
Proceedings of the 3rd European Conference on Computer Network Defense, EC2ND 2007
Paper in proceedings
2009

Statistical decision making for authentication and intrusion detection

Christos Dimitrakakis, Aikaterini Mitrokotsa
8th International Conference on Machine Learning and Applications, ICMLA 2009, p. 409-414
Paper in proceedings
2008

Cost-minimising strategies for data labelling: Optimal stopping and active learning

Christos Dimitrakakis, C. Savu-Krohn
Foundations of Information and Knowledge Systems, FoIKS 2008
Paper in proceedings
2008

Algorithms and Bounds for Sampling-based Approximate Policy Iteration

Christos Dimitrakakis, Michail Lagoudakis
EWRL 2008
Paper in proceedings
2008

Exploration in POMDPs

Christos Dimitrakakis
OGAI Journal (Oesterreichische Gesellschaft fuer Artificial Intelligence). Vol. 27 (1), p. 24-31
Magazine article
2008

Rollout sampling approximate policy iteration

Christos Dimitrakakis, M.G. Lagoudakis
Machine Learning. Vol. 72 (3), p. 157-171
Journal article
2008

Tree exploration for bayesian RL exploration

Christos Dimitrakakis
2008 International Conference on Computational Intelligence for Modelling Control and Automation, CIMCA 2008, p. 1029-1034
Paper in proceedings
2006

Nearly Optimal Exploration-Exploitation Decision Thresholds

Christos Dimitrakakis
Artificial Neural Networks – ICANN 2006
Paper in proceedings
2006

Ensembles for sequence learning

Christos Dimitrakakis
Doctoral thesis
2005

Online adaptive policies for ensemble classifiers

Christos Dimitrakakis, S. Bengio
Neurocomputing. Vol. 64 (1-4 SPEC. ISS.), p. 211-221
Journal article
2005

Boosting word error rates

Christos Dimitrakakis, S. Bengio
ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings. Vol. V, p. V501-V504
Paper in proceedings
2005

Gradient-based Estimates of Return Distributions

Christos Dimitrakakis
PASCAL workshop on Principled Methods of Trading Exploration and Exploitation
Paper in proceedings
2004

Boosting HMMs with an application to speech recognition

Christos Dimitrakakis, Samy Bengio
Acoustics, Speech, and Signal Processing, 2004. Proceedings. (ICASSP '04). IEEE International Conference on
Paper in proceedings

Projects

2016–2019

Learning, privacy and the limits of computation

Christos Dimitrakakis Computing Science (Chalmers)
Swedish Research Council (VR)

2015–2017

SwissSenseSynergia (SNSF)

Christos Dimitrakakis Computing Science (Chalmers)
Aristide Tossou Computing Science (Chalmers)
Aikaterini Mitrokotsa Networks and Systems (Chalmers)
Swiss Federal Laboratories for Materials Science and Technology (Empa)

2015–2018

ACE: Approximate Algorithms and Computing Systems

Per Stenström Computer Engineering (Chalmers)
Johan Karlsson Computer Science and Engineering (Chalmers)
Sally A McKee Computer Engineering (Chalmers)
Ulf Assarsson Computer Engineering (Chalmers)
Ioannis Sourdis Computer Engineering (Chalmers)
Devdatt Dubhashi Computing Science (Chalmers)
Christos Dimitrakakis Computing Science (Chalmers)
Alexandra Angerd Computer Engineering (Chalmers)
Jacob Lidman Computer Engineering (Chalmers)
Behrooz Sangchoolie Computer Engineering (Chalmers)
Fatemeh Ayatolahi Computer Engineering (Chalmers)
Albin Eldstål Damlin Computer Engineering (Chalmers)
Miquel Pericas Computer Engineering (Chalmers)
Erik Sintorn Computer Engineering (Chalmers)
Swedish Research Council (VR)

There might be more projects where Christos Dimitrakakis participates, but you have to be logged in as a Chalmers employee to see them.