488QUANTUM KEY BASED MESSAGE AUTHENTICATION APPROACH IN WIRELESS SENSOR NETWORKSources Anonymity Message authentication is providing various services such as confidentiality, integrity, protection of privacy in wireless sensor network. Message authentication schemes can be largely divided into two methodologies: asymmetric key based and symmetric-key based approaches. The symmetric-key based approach requires complex key management, lacks of scalability, and is not flexible to large numbers of node negotiation attacks. Since the message sender and the receiver have to share a secret key. However, both symmetric and asymmetric key methods have the limitations of high computational and communication overhead in addition to lack of scalability and resilience to node compromise attacks. To address these issues, existing work describes a scalable authentication scheme based on Elliptic Curve Cryptography (ECC). While enabling intermediate node authentication that allows any node to transmit an unlimited number of messages. There are several possible attacks are described against the ECC method. Quantum Key Distribution (QKD) measures against the man in the middle attack, Trojan horse attack and denial of service attack. An experimental result shows that the scheme quickly detects untrustworthy hop with a small number of trust reports. The QKD scheme provide message source and destination privacy in wireless sensor network environments.selvapriya.2473@yahoo.comResearch652016 Public key,Symmetric key,Quantum keyGomalapriya,S.SasirekhaPG Scholar/CSE, Nandha Engineering College, Erode, Tamilnadu, India.,Associate Professor/CSE, Nandha Engineering College, Erode, Tamilnadu, India.