Implementation of Symmetric Key Using Dlcs for Wireless Sensor Network

In the design of WSN protocols the harsh environments and the existence of threats demand more careful security considerations. Cryptography is the art of achieving security by encoding messages to keep the information non-readable. Cryptography actually is a mathematical scrambling and unscrambling of data to achieve, Confidentiality (Readable only to sender and receiver), Integrity (not modified by any one to integrity of message), Availability (sender can´t refuse the claim of not sending), and Entity authentication. While sending or receiving the data, special keys are used to encrypt/decrypt data to verify the original contents. This key makes the process of cryptography secure. There are two approaches for the generation of encryption/decryption keys i.e. software and hardware. The purpose of this paper is to generate encryption key using hardware technique. To design electronics circuit basic concept is derived from encoding and decoding of data via four different channels at different times. Selections of channels will be guided by timer and decoder circuits. As in the defense there are different hierarchy levels and they need secure communication. The purpose of this paper is to generate the key codes using electronic circuits to make the data more secure. The technique used in this paper is more secure then discussed in prior papers.