In this subject, the main security problems or threats in networks and telematic services are studied in a unified way, and different techniques are presented to protect them. The topic is first approached from a general point of view, so that the security concepts, services, and techniques studied are applicable to any type of network, telematic service, or information system to be secured. This block consists of topics 1 to 4. This leads to a detailed examination of the three central security topics: the algorithmic part (encryption, digital signature, and integrity), authentication protocols, and key management and negotiation procedures. The objective is for the student to acquire a solid foundation that enables them to understand the specific techniques required by each application as well as to apply them to other areas they may encounter. The topic is then addressed in a somewhat more specific way, reviewing the problems, techniques, and security standards in some of the most prevalent communication environments today. A topic is dedicated to security at the IP level, a central protocol in the Internet architecture, and another topic to web security, given the current relevance of this telematic communication medium, where the student will assimilate the theoretical and practical concepts of the SSL protocol, central to the security of transactions over the web. Due to the increasing use of wireless communications and their particular security issues, a topic is also dedicated to them. The course concludes with an introduction to two other topics of increasing importance: malicious networks and software, and forensic analysis of information systems.
