1
Gollmann D. Computer security. 3rd ed. Chichester, West Sussex: : Wiley 2011. 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.