Locked Digital Envelope System Grounded on Hash Function for Providing Key Security Features

In data communication, the digital signature and digital envelope are the two widely used techniques. Where digital envelope provides only confidentiality and digital signature provides non-repudiation, confidentiality and integrity. Digital envelope is using symmetric and asymmetric key cryptography but not providing all security features like authentication, non-repudiation and integrity. In order to achieve all security features, we have used MD5 with asymmetric and symmetric key cryptography. We have implemented a novel digital envelope technique which provides all security features at once. Novel digital envelope comprises of digital signature and best of both the world and providing security features like non-repudiation, authentication, confidentiality and integrity. We have used blowfish and RSA (Ron Rivest Shamir Adelman) algorithm in integration with MD5. In result, out integrated solution meets above mentioned requirement and it also removed the deficiency of current digital envelope technique and strengthen the security of ad-hoc network, Wireless sensor network, Wireless network.