This course aims to introduce you to the principles and techniques of securing computers and 
computer networks, with focus on Internet security. The course is effectively split into two 
parts: first introducing the theory of cryptography, including how many classical and popular 
algorithms work (e.g. DES, RSA, digital signatures); and second providing details of real 
Internet security protocols, algorithms and threats (e.g. IPsec, viruses, firewalls). Hence you 
will learn both theoretical aspects of computer and network security, as well as how that theory 
is applied in the Internet. This knowledge will help you in designing and developing secure 
applications and network protocols, as well as building secure networks.