The security of encryption algorithms depends heavily on the computational infeasibility of brute force attack. 加密算法的安全性很大程度上取决于暴力破解的不可行性。
Infeasibility study analyzing the feasibility from opposite parts will bring a full-scale viewpoint for the determination of a project to be set up.So, it cannot be neglected. 不可行性研究从反方向来论证可行性程度，为全面分析项目的可行性奠定基础，以判断项目的最后取舍，所以不可行性研究不可缺少。
