@book{3993,
	author = {GUPTA, BY SUNIL.},
	title = {Introduction to Cryptography and Network Security},
	publisher = {S K KATARIA & SONS,},
	year = {2010.},
	address = {Delhi},
	url = {http://www.amazon.com/exec/obidos/ASIN/819069197X/chopaconline-20}
}