Upadhyay, Vidya VaridhiUpadhyay, RitujaUpadhyay, M M2004-07-302010-04-082004-07-302010-04-082003-02http://hdl.handle.net/1944/208Libraries and information centers are changing rapidly towards digitization. Now a days a stand-alone computer is of no use. It must be on network to utilize the resources. In the process of computer communication and data transmission the issue of network security arises. In this paper we try to the explain the meaning of network security, possible attacks, threats upon it and various approaches used to achieve this security.40459 bytesapplication/pdfenNetwork SecurityEncryptionData TransmissionDigital LibraryArticle