K. Suyama, S. Ebisawa and S. Komatsu：Detection of eavesdropping for point-to-multipoint optical chaotic communication, Technical Digest, OSA Frontiers in Optics 2009 (San Jose, USA, October 2009). (JWC52)

Based on the characteristics of point-to-multipoint optical chaotic communication system, we discuss the effect of parameter mismatch between the transmitter and receiver laser diodes and propose a new method for reasonably efficient of detecting eavesdropping.