基于多分辨离散模型的图形密码

摘要

In order to enhance the utility and security of the Click-based graphical passwords which apply in touch-screen mobile terminal. By introducing the multi-resolution into dscretization process, a multi-resolution discretization model for graphical password is proposed. Comparative analysis of the data show that the multi-resolution model obtains larger password space than existed discretization approaches at the same image size and fault-tolerant distance, so it can increase the difficulty of attack and improve security. Meanwhile, the multi-resolution model can adjust the level of security, enhance the utility by expanding fault-tolerance distance.%为了增强点击型图形密码在触摸屏移动智能终端应用中的易用性和安全性,离散化过程中引入多分辨思想,提出了一种用于图形密码的多分辨离散模型.对比分析数据表明,多分辨离散模型可以在相同的图像尺寸和容错距离情况下,获得比已有离散化方法更大的密码空间,增加攻击难度,提高安全性.同时多分辨离散模型可调整安全强度,可通过扩大容错距离来提高易用性.