Action-based graphical password: “Click-a-Secret”

This paper relates to a novel graphical system named “Click-a-Secret” that allows entering a secret through interactions with an image. Seamless modifications of the image will create a new image and derive corresponding secret. In this article, we will focus on access control related applications. However, other usages are possible in various cryptographic systems (e.g.: secret key to encrypt data, etc.). It is well known that humans use long-term memory for storing pictures therefore leading to better recall of images compared to text. This leads to improved memorization of graphical passwords.