Abstract : Biometric is simply a dimension related to human characteristics. It deals with automated strategies for recognizing or verifying someone based on his biological or behavioral features. The safety and convenience provided by biometric data are higher than any other personal identification methods. But there is also a high-risk factor in case of compromising biometric traits, since revoking it and reissue with a new one is not possible for biometric data. This paper focuses on the security aspects of iris biometric recognition system and a survey based on various template protection schemes. Many schemes are proposed to provide security to iris templates in a database such as biometric cryptosystems, template transformation methods, steganography, and visual cryptography. © 2018 Academic Press. All Rights Reserved.