Now-a-days many encryption algorithms have been proposed for network security. In this paper, a new cryptographic algorithm for network security is proposed to assist the effectiveness of network security. Here symmetric key concept instead of public key is considered to develop the encryption – decryption algorithm. Also, to give more security in the algorithm, the idea of one way function alongwith Newton’s method is applied as a secret key to the proposed work as well as Digital Signature Standard (DSS) technology is used to send the key. Moreover, steganography is used to hide the cipher within a picture in encryption algorithm. In brief, a numerical method based secret key encryption – decryption algorithm is developed using steganography to enhance the network security.
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