The individual privacy linking to the widespread use of personal information appears to be a new phenomenon for networked society. In a conventional biometrics enabled authentication system, the privacy remains a controversial topic. Biometric characteristics are indisputable and unique to an individual hence the compromise of the biometric template is permanent. Cancelable biometrics was introduced to address this problem by constructing revocable biometric template that allows multiple templates to be associated to the same biometric trait. This concept gains advantages over the traditional authentication for its superiority in security. In this paper, we proposed a method that adopts the notion of image hashing by transforming the iris biometrics into a short bit string irreversibly. The experiments are tested on CASIA iris data set with promising result.