Subject: Security in Communication Systems

Scientific Area:



80 Hours

Number of ECTS:

7,5 ECTS



Overall objectives:

1 - The discipline of Security in Communication Systems has as its main objective to empower students with knowledge of the key vulnerabilities of computer systems and networks, enabling students the knowledge of the main mechanisms and security technologies, design and installation of security solutions in Networking computer.


1 - Introduction
2 - Security in physical layer.
3 - Security in Data Link layer (local networks, switched and permanent connections and wireless networks).
4 - Security in Network and Transport layers (Characterization of attacks, Sniffing attacks, DOS attacks, Spoofing attacks and, mechanisms and techniques for protection: IPSec, VPNs, SSL and TLS)
5 - Security in Application layer (protection mechanisms: SET (Secure Electronic Transaction), X.509 Certifications, S/MIME, Kerberos, and auditing tools)
6 - Access control (firewalls, Trusted systems, intrusion detection systems, malicious software and biometry).
7 - Authentication and encrypting (needs for authentication and encrypting, techniques, encryption keys management and certification entities).
8 - Identification of Security vulnerabilities and Risk Analysis.
9 - Auditing and monitoring tools (ping, traceroute, netstat, wireshark, nmap, portscan and services).
10 - Tools for remote sensing problems.
11 - E-mail Security: PGP.
12 - Authentication and encryption techniques (AAA).
13 - Security Configuration in the network equipment (virtual lines, authentication).
14 - Port Security
15 - Security in Wireless Networks.
16 - IPTables and ACL's.
17 - Firewalls.
18 - Virtual Private Networks.
19 - Intrusion Detection and Prevention System.


William Stallings , 2006 , Cryptography and Network Security: Principles and Practice , Prentice Hall
André Zúquete , 2006 , Segurança em Redes Informáticas , FCA Editora de Informática
Henrique São Mamede , 2006 , Segurança Informática nas Organizações , FCA Editora de Informática
Chris Brenton , 2003 , Mastering Network Security , Sybex Press

Assesssment methods and criteria:

Classification Type: Quantitativa (0-20)

Evaluation Methodology:
Exam: The exams (2, 35% each) aim at assessing the theoretical and practical knowledge. Thus, the students are able to evaluate their performance along the semester and change their learning strategies if necessary: Project: The project allows students to carry out research, including reading scientific papers and magazines. The students should elaborate a report and present a seminar. (30% of the classification of the C U)