1.
Gollmann D. Computer security [Internet]. 3rd ed. Chichester, West Sussex: Wiley; 2011. Available from: http://UCL.eblib.com/patron/FullRecord.aspx?p=819182
2.
Anderson R. Security Engineering: A Guide to Building Dependable Distributed Systems. 3rd ed.
3.
William Stallings. Cryptography and network security. Upper Saddle River, N.J: Pearson/Prentice Hall; 2006.