The cancelable biometric system is susceptible to a variety of attacks aimed at deteriorating the integrity of the authentication procedure. These attacks are intended to either ruin the security afforded by the system or deter the normal functioning of the authentication system. This paper describes various threats that can be encountered by a cancelable biometric system. It specifically focuses on preventing the attacks designed to extract information about the transformed biometric data of an individual, from the template database. Furthermore, we provide experimental results pertaining to a system combining the cancelable biometrics with segment-based visual cryptography, which converts traditional biocode into novel structures called shares. © Springer Science+Business Media Singapore 2017.