Marie Curie Initial Training Networks

iSocial Workshop: Decentralized Online Social Networks, 26-27 September 2016



                                                            photograph source:

Date: September 26 - 27, 2016

Location: Aldemar Knossos Royal Village Hotel, Hersonissos, Crete, Greece

Organised by: FORTH-ICS


                                                              AGENDA            SPEAKERS            PHOTOS







Thursday, 26 September 2016

09:00 - 09:10

 Coordinator's Welcome

Session I - Session Chair: Elena Ferrari

09:10 - 10:10

 "Big Data Security and Privacy" - Elisa Bertino

10:10 - 11:10

 "Rack-Scale Operating System" - Dejan Milojicic

11:10 - 11:30 Coffee Break
11:30 - 12:00  iSocial Fellow Poster pitches
12:00 - 12:15  iSocial Video Challenge Award
12:15 - 13:30 Lunch Break

Session II - Session Chair: Sarunas Girdzijauskas

13:30 - 14:30

 "Mining open datasets for transparency in taxi transport in metropolitan environments"  - Tasos Noulas

14:30 - 15:30

 Fellow Poster session - Coffee Break

15:30  Knossos tour  -  bus departing from Hotel entrance
19:30  Dinner at Heraklion Restaurant PARASTIES and return to hotel



Thursday, 27 September 2016

Session I - Session Chair: Sarunas Girdzijauskas

09:30 - 10:30   

 "Engineering Decentralized Sociotechnical Systems via Social Protocols" - Amit Chopra

10:30 - 11:30   

  " Security and privacy for emerging large-scale mobile systems" - Panos Papadimitratos

11:30 - 12:00    Coffee Break - Poster Session
12:00 - 13:00  

  "Social Networking over Mobile Devices: Insights on Behaviour and Infrastructure Impact" - Kostas Anagnostakis   

12:15 - 13:30    Lunch Break

Session II - Session Chair: Vivi Fragopoulou

14:30 - 15:30  

 "I Always Feel Like Somebody’s Watching Me: Measuring Online Behavioural Advertising" - Nikolaos Laoutaris

15:30 - 16:00  

Coffee Break - Poster session

16:00 - 17:00   

 "Good City Life" - Daniele Quercia

17:00 - 17:30  

 "Information diffusion on and offline" -  Bruno Goncalves






Elisa Bertino                  Purdue University, USA  Dejan Milojicic              HP Labs, Palo alto, USA   Panos Papadimitratos        KTH, Sweden  Daniele Quercia             Bell Labs, UK
Tasos Noulas                      Lancaster University, UK Amit Chopra               Lancaster University, UK Bruno Goncalves                 New York University, USA Nikolaos Laoutaris      Telefónica, Spain Kostas Anagnostakis   Niometrics, Singapore












iSocial Video Challenge, 01 March - 15 May 2016




Social Networking has become a major factor in our everyday lives influencing the way we communicate, collaborate, learn, do business, build relationships and understand society. Many people have used Online Social Networks (Facebook, Twitter, LinkedIn, Google+, Flickr etc) to connect with friends and family in distant parts of the world, to make connections that have advanced their careers in leaps and bounds and to explore and visualize not only their own network of friends but the networks of their friends, family, and colleagues.

The main objective of iSocial is to provide world class training for a next generation of researchers, computer scientists, and Web engineers, emphasizing on a strong combination of advanced understanding in both theoretical and experimental approaches, methodologies and tools that are required to develop novel Online Social Networking (OSN) platforms. To foster publicity of the iSocial research activities, we announce a video challenge that will be opened to students of secondary schools and Universities. 

Description of the Challenge:

The iSocial Video Challenge provides high school and first-year undergraduate students in Europe with the opportunity to deliver a 2 minutes video in YouTube where the theme is:

 “Online Social Networks for Health and Well-being”

The participants are expected to propose a novel way (new features or services) of using OSNs which would benefit the users or society at large. Teams of up to three students are eligible to participate, and videos will be judged by the iSocial consortium.

The videos will be evaluated taking into account the following questions:

  •  How well is the proposed idea conveyed in the video?
  •  How novel is the proposed idea?
  •  What are the benefits of the proposed idea and what functionality does it bring to OSNs?
  •  How realistic/feasible is to implement the proposed idea to current OSNs?


The winners will be invited to present their idea at the iSocial workshop in conjuction with ESORICS 2016 conference that will take place in Crete, Greece (September 2016). Their expenses (air tickets/accommodation) will be covered by the project.

Submissions are accepted online between March 30 and May 15, 2016. The URL of the video should be sent at: This email address is being protected from spambots. You need JavaScript enabled to view it..






Future Cloud Summer School (FCSS), 3 - 14 August 2015. Stocholm



Date: August 3 - 14, 2015

Location: Stocholm, Sweden

Organised by: Royal Institute of Technology (KTH) in conjuction with EIT ICT Labs



Agenda     Photos


The Future Cloud Summer School  2015  will be held the first week (from August 3 to 9) at Bergendal, and the second week (from August 10 to 14) at EIT-ICT Labs Stockholm Co-location Center.


The FCSS is a two weeks event open to EIT-ICT Labs MSc students and EU Marie Curie ITN "iSocial" fellows as well as PhD students and postdocs from Europe. Students following this school will attend lectures from leading researchers and practitioners from academia and industry. The FCSS also includes a business proposal competition organized between student groups. Moreover, FCSS organizes the Big Data Analytics seminar on Friday, August 7, which is an open one-day, high quality event focusing on Cloud business and technology and opened to a large audience. The goal of this summer school is to teach advanced topics related to algorithms and platforms for Big Data as well as to enhance the innovation and entrepreneurial awareness among students. The FCSS will cover both presentations by researchers on Big Data analytics and platforms as well as presentations by company experts on business models. Through the two weeks students will work in teams of two to four on problems that will be initiated by leading European companies working on Big Data.



August 3

August 4

August 5

August 6

August 7

August 8

August 9



I&E Breakfast

Project selection and review, BMC and lean methods


I&E Breakfast

Importance of roles in teams and hiring


I&E Breakfast

Overview of business models in the cloud space


I&E Breakfast

The perfect pitch


I&E Breakfast

Summary of first week

Social Event

(Kayaking, Hiking)


Welcome Speech

Speaker: Seif Haridi (KTH/SICS, Sweden) (slides)

 Introduction to the I&E
Speakers: Björn Hovstadius and Boris Nordenström (slides)

Hadoop Ecosystem        

Speaker: Sameh Al-Ansary (Nile University, Egypt) (slides)

Big Data Management and Apache Flink,

Speaker: Volker Markl

(TU Berlin, Germany) (slides)


 Speaker: Paco Nathan (Databricks, USA) (slides)

      EIT ICT Labs    Speaker: Janne Järvinen

Data Stream Processing

Speakers: Paris Carbone and Gyula Fora (SICS, Sweden) (slides)

      Social Event                                               
Coffee Break

Big Data at Spotify Speaker: Anders Arpteg (slides)


Hadoop Ecosystem

Speaker: Sameh Al-Ansary (Nile University, Egypt)


Speakers: Ufuk Celebi and Max Michels (Data Artisans, Germany) (slides1) (slides2) (lab)


Speaker: Paco Nathan (Databricks, USA)

Big Data and Deep Learning: Scalability and Fault Tolerance of Parallel and Distributed Infrastructures

Speaker: Divyakant Agrawal (UCSB, USA) (slides)


Speakers: Paris Carbone and Gyula Fora (SICS, Sweden) (slides) (labs)

Social Event


Company presentation by Ericsson Speaker: Rickard Cöster

Hadoop Ecosystems

Speaker: Sameh Al-Ansary


Speakers: Ufuk Celebi and Max Michels (Data Artisans, Germany)



Speaker: Paco Nathan (Databricks, USA)

Mining Democracy, Speaker: Matthias Grossglauser (EPFL, Switzerland) (slides)

Stateful distributed dataflow graphs

Speaker: Peter Pietzuch (Imperial College, London UK) (slides)

Social Event

Company presentation by Augify, Speaker: Jay Solomon (slides)


Company presentation by  by Mentimeter, Speaker:  Jonny Varström (slides)

Hadoop Ecosystems

Speaker: Sameh Al-Ansary


Speakers: Ufuk Celebi and Max Michels (Data Artisans, Germany)


Speaker: Paco Nathan (Databricks, USA)

Mining Democracy, Speaker: Matthias Grossglauser (EPFL, Switzerland)

Stateful distributed dataflow graphs

Speaker: Peter Pietzuch (Imperial College, London UK) 


Company presentation  by Karriärföretagen, Speaker: Per Rundblom (slides)

Company and case presentation by Novartis, Speaker: Jean-Michel Gaullier (slides)


Locality-Sensitive Hashing - Part 1

Speaker: Jeffry D. Ullman (Stanford, USA) (slides)


Speakers: Ufuk Celebi and Max Michels (Data Artisans, Germany)


Speaker: Jeffry D. Ullman (Stanford, USA) (slides)

Using Social Media for Health Studies,

Speaker: Ingmar Weber (QCRI, Qatar) (slides)

Machine Learning

Speaker: Anders Holst (SICS, Sweden) (slides) (labs)

Social Event
15:00-16:00 Company presentation by Skillable, Speaker: Marcello Grita (slides)

Locality-Sensitive Hashing - Part 2

Speaker: Jeffry D. Ullman (Stanford, USA) (slides)

Counting Distinct Elements in a Stream

Speaker: Jeffry D. Ullman (Stanford, USA) (slides)

Graph Algorithms

Speaker: Jeffry D. Ullman (Stanford, USA) (slides)

Google Cloud DataFlow

Speaker: Cosmin Arad (Google USA) (slides)

Machine Learning

Speaker: Anders Holst (SICS, Sweden)

Social Event
Coffee Break
16:30-17:30 Team formation and Case selection Sampling and Filtering Data Streams
Speaker: Jeffry D. Ullman (Stanford, USA) (slides)

Page Rank

Speaker: Jeffry D. Ullman  (Stanford, USA) (slides)

Designing Good MapReduce Algorithms

Speaker: Jeffry D. Ullman  (Stanford, USA) (slides)

Google Cloud DataFlow

Speaker: Cosmin Arad (Google USA)

SPARK Machine Learning

Speaker: Paco Nathan (Databricks, USA) (slides)

Social Event



Social Event


2. Photos








iSocial Research Meeting, 28-29 January 2016, Milan


Date:  28-29 January 2016

Location: Milan, Italy



Thursday, 28 January 2016


 Welcome / Agenda


 Individualism and collectivism in social dynamics: contact process with stochastic opinion fluctuations in complex networks - Liudmila Rozanova (UB)   presentation


 Hidden geometric correlations in real multilayer networks: evidence and implications - Kolja Kleineberg (UB)  presentation

10:45-11:15  Coffee Break


 DLSAS: Distributed Large-Scale Anti-Spam for DOSNs - Amira Soliman (KTH)  presentation


 Label-based access control for more flexible privacy settings for OSNs users - Leila Bahri (IU)   presentation

12:30-13:45 Lunch


 Distributed Publish/Subscribe Notification System for Online Social Networks - Stefanos Antaris (UCY)   presentation


 Detecting and Understanding User Patterns from Online Social Network Activity  - Hariton Efstathiades (UCY)   presentation

15:15-15:45 Coffee Break


 Scalable Blocking for Privacy Preserving Record Linkage - Alexandros Karakasides (UCY)  presentation


 iSocial matters


Thursday, 29 January 2016


 When Two Choices Are not Enough: Balancing at Scale in Distributed Stream Processing - Anis Nasir (KTH)   presentation


 Node-cut partitioning of dense, weighted graphs with application to topic detection in text - Kambiz Ghoorchian (KTH)  presentation

10:30-11:00 Coffee Break


 Distributed Group Identification and Local Risk Estimation in OSNs and DOSNs - Naeimeh Laleh (INSUB)


 Privacy, intellectual property and censorship issues in OSNs - Panagiotis Ilia (FORTH)  presentation

12:30-13:45 Lunch


 Investigating the complete corpus of Referendum and Elections tweets  - Despoina Antonakaki (FORTH)  presentation


 Location based access control for P2P video streaming - Giovanni Simoni   (PEER)   presentation

15:15-15:45 Coffee Break


 Sub-project/secondment meetings








Workshop: "Online Social Networks: Data Management and Privacy/Security", 21-22 May 2015, Crete, Greece


Venue  Invited Speakers  Program Photos



Date: May 21 - 22, 2015

Location: Aldemar Knossos Royal Village Hotel, Hersonissos, Crete, Greece

Organised by: FORTH-ICS


1. Venue and structure

FORTH - ICS, is hosting the workshop entitled: "Online Social Networks: Data Management and Privacy/Security" that will take place on 21-22 May 2015, at the Aldemar Knossos Royal Village Hotel in Crete.

The workshop on "Online Social Networks: Data Management and Privacy/Security" is organised by the Marie Curie Initial Training Network (ITN), iSocial.

2. Invited Speakers

University of Milan logo

Day 1: May 21, 09:15 - 17:30

Marios Leventopoulos
Computer and Network Security, Facebook



facebook CBettini

Prof. Claudio Bettini

Department of Computer Science,
University of Milan



Maritza Johnson
Research Group, Google, USA


google logo 41


Eiko Yoneki
Research Fellow
Data Centric Systems and Networking Group,Computer Laboratory Systems Research Group
University of Cambridge


cambridge logo
Day 2: May 22, 09:15 - 18:00

Igor Bilogrevic
Research Scientist,
Google, Zurich

google logo 41 BZhang

Boxun Zhang
Data Scientist
Sthlm Spotify Tech Group,



Michal Piorkowski
Head of Big Data Discovery
Swisscom, Geneva, Switzerland

swisscom FBonchi

Francesco Bonchi
Director of Research,
Yahoo Labs,



Dr. Nikolaos Laoutaris
Senior Researcher, Internet Group
Telefonica Research, Barcelona


telefonica tid  

3. Agenda

Thursday, 21 May 2015

09:15 - 09:30

Coordinator's Welcome

Session I - Session Chair: Elena Ferrari

09:30 - 10:30

Intrusion and Abuse Detection at Facebook
Speaker: Marios Leventopoulos (Facebook) 

10:30 - 11:30

Privacy in Geo-social Networks and Beyond
Speaker: Claudio Bettini (University of Milano and EveryWare Technologies)

11:30 - 12:00 Coffee Break
12:00 - 13:00

Choosing the Right Audience: How People Manage who can see their Facebook Content
Speaker: Maritza Johnson (Google USA)

13:00 - 14:30 Lunch Break

Session II - Session Chair: Sarunas Girdzijauskas

14:30 - 14:45

iSocial Video Challenge Award
Winner: Noa Yehezkel

14:45 - 15:30

Fellow Short Presentations

15:30 - 16:30

Coffee Break – Poster Session

16:30 - 17:30 Influential Neighbours Selection for Information Diffusion
Speaker: Eiko Yoneki (University of Cambridge)
17:30 - 18:30

iSocial Fellow meets Facebook
Speaker: Marios Leventopoulos, Facebook


Friday, 22 May 2015

Session IΙΙ– Session Chair: Sarunas Girdzijauskas
09:15 - 10:15

A Machine-Learning Based Approach to Privacy-Aware Information Sharing in Mobile Social Networks
Speaker: Igor Bilogrevic (Google Zurich)

10:15 - 11:15

Data Science and Machine Learning at Spotify
Speaker: Boxun Zhang (Spotify)

11:15 - 12:00 Coffee Break – Poster Session
12:00 - 13:00

Implementing Data Skepticism
Speaker: Michal Piorkowski (Swisscom Data Science Team)

13:00 - 14:30

Lunch Break

Session IV Session Chair: Paraskevi Fragopoulou

14:30 - 15:30

Speaker: Francesco Bonchi

15:30 - 16:00

Coffee Break – Poster Session

16:00 - 17:00

The Vision for a Data Transparency Lab
Speaker: Nikolaos Laoutaris (Telefonica)

17:00 - 18:00 Bilateral meetings between iSocial micro-project partners


4. Posters

# Poster Title Poster Presenter: Partner Institution:
1 Evolving Twitter: An experimental analysis of graph properties of the social graph Despoina Antonakaki FORTH
2 Identification of Key Locations based on Online Social Network Activity Hariton Efstathiades UCY
3 Socio-­‐Aware Decentralized Topology Construction Protocol Stefanos Antaris PEER
5 CoMPAC: Collaborative Multi-Party Access Control for OSNs Panagiotis Ilia FORTH
6 Distributed Graph Based Risk Assessment by Gossip Learning in DOSN Naeimeh Laleh INSUB
7 Evolution and Ecology of the Digital World Kolja Kleineberg UB
8 Graph-based Compromised Account Identification Kambiz Ghoorchian KTH
9 Adapting Access Control Mechanisms from other Domains For Better & Usable Privacy in OSNs Leila Bahri INSUB
10 Update Propagation in a P2P Application Store Andrés García García IBM