Abstract

Modern computing is observed to be highly dependent on communication and data transport. The

security of data during communication has become a mandatory need since the introduction of e-

commerce, mails, etc. Moreover a lot of data may be required to be kept secure on local devices

also. The encryption of data is the basic requirement today and thus helps to maintain

confidentiality of data. A number of algorithms are available for encrypting data while it is transferred from sender to receiver. In this paper we have proposed a cipher which uses basic encryption techniques of substitution and transposition along with application of logic gates, in order to encrypt the data.