Εξάμηνο: 8th semester

In the 8th semester, students beyond the final year project shall choose one compulsory courses of the secondary major (CSM) of the (main) Major that they have chosen and four optional courses (Opt) through the list of the available courses of all majors.

Mobile and Wireless Communications Security

Learning Outcomes

The aim of the course is to familiarize students with the concept of security in mobile / wireless communications. Mobile / wireless communications provide mobile users with a wide range of multimedia services that already exist for non-mobile users and stable networking, regardless of location. Along with new prospects, however, mobile / wireless communications raise new concerns about security issues.

Upon successful completion of the course, the student will be able to handle, apply and evaluate the security techniques and measures applied to mobile and wireless environments.

Course Contents

  • Wireless security
  • WLAN, IEEE 802.11
  • Authentication check on IEEE 802.11
  • RADIUS & EAP methods
  • IEEE 802.1x
  • WEP
  • IEEE 802.11i, WPA, WPA2 (TKIP, CCMP)

Recommended Readings

  • Zhang Y., Zheng J. & Ma M. (2008): Handbook of Research on Wireless Security, Information Science Reference.
  • Butty L. & Hubaux J.-P. (2007): Security and Cooperation in Wireless Networks: Thwarting Malicious and Selfish Behavior in the Age of Ubiquitous Computing, Cambridge University Press.

Data Warehouses and Data Mining

Learning Outcomes

The students upon the successful completion of the course will be able:

  • to evaluate the quality of the data to be analyzed and apply the appropriate data pre-processing techniques,
  • to select the appropriate data mining technique based on requirements and data type,
  • to design and develop data warehouses,
  • to use the appropriate data mining techniques and tools to extract knowledge from data collections,
  • to evaluate the quality of data mining results.

Course Contents

  • Introduction to the fundamental data mining concepts and techniques: main steps of knowledge and data discovery, requirements of developing data mining approaches.
  • Data pre-processing: data cleaning, transformation, dimensionality reduction.
  • Data warehouses: multidimensional models, architecture, implementation of data warehouses, OLAP.
  • Clustering: partitional, hierarchical, density-based, grid-based, spectral clustering, clustering applications.
  • Classification: Bayesian classifiers, decision trees, k-nearest neighbors.
  • Association rules: Apriori, representative association rules.
  • Quality assessment in data mining: evaluation of classification models, association rules interestingness measures, cluster validity.
  • Web mining: link analysis, text mining, web search, PageRank.

Recommended Readings

  • Han J. & Kamber M. (2006): Data Mining: Concepts and Techniques, 2nd Edition, Morgan Kaufmann.
  • Chakrabarti S. (2002): Mining the Web, Discovering Knowledge from Hypertext Data, Morgan Kaufman Publishers.

Information Retrieval

Learning Outcomes

The aim of this course is learning fundamental concepts of information retrieval systems. The course’s contents cover all stages of system design and implementation for collection, indexing and searching of text documents, as well as evaluation methods. In addition, recent trends in information retrieval are also covered, for example information retrieval from the WWW.

Upon successful completion of the course, the students will be in position:

  • to know representation models for text documents.
  • to use techniques for indexing, compression, retrieval and scoring of documents.
  • to develop applications that manage large volumes of text.
  • to build the functionality of a search engine.
  • to apply machine learning techniques for text classification.

Course Contents

  • Introduction and basic IR concepts
  • System architecture of IR systems
  • Dictionaries and inverted indexes
  • Construction and compression of dictionaries
  • Information retrieval models (boolean model, vector space model, probability models)
  • Scoring and ranking documents
  • Language models
  • Information retrieval from XML documents
  • Basic concepts of information retrieval from the WWW
  • Web crawling and indexing
  • Text classification with machine learning techniques, support vector machines, algorithms for text classification

Recommended Readings

  • Christopher D. Manning, Prabhakar Raghavan and Hinrich Schütze, Introduction to Information Retrieval, Cambridge University Press. 2008.
  • Ricardo A. Baeza-Yates and Berthier Ribeiro-Neto. 1999. Modern Information Retrieval. Addison-Wesley Longman Publishing Co., Inc., Boston, MA, USA.