1. Buchmann, J.: Introduction to Cryptography, 2nd edn. Springer, New York (2004)
2. Lecture Notes in Computer Science;J. Camenisch,2009
3. Gentry, C.: A fully homomorphic encryption scheme. PhD thesis, Stanford University (2009),
http://crypto.stanford.edu/craig
4. Goluch, S.: The development of homomorphic cryptography – From RSA to Gentry’s privacy homomorphism. Master thesis, Vienna University of Technology (2011),
http://www.ub.tuwien.ac.at/dipl/2011/AC07811660.pdf
5. International Telecommunication Union: E.164 – The international public telecommunication numbering plan,
http://www.itu.int/rec/dologin_pub.asp?lang=e&id=T-REC-E.164-201011-IPDF-E&type=items