These derailments are due to cracks in the railway tracks. Therefore there is immense need of crack detection and security system. This paper propose the crack detection system in the rail tracks. This is to avoid rail accidents by using latest communication technologies. In this project GSM communication protocols are used to convey the message of crack detection via SMS. Crack detection is achieved by using the concept of eddy current losses implemented in the terms of darlington pair circuit. With the detection of cracks, the system also alerts the railway authorities facilitating the security system.