基于熵的密码强度估计

Estimating Password Strength Based on Entropy

密码是电子认证的基础,密码的保护以及密码强度或抗破解能力对受保护信息或信息系统的安全至关重要。目前还没有一个准确定义密码强度的方法,基于熵的概念,借助猜测熵和最小熵对密码强度进行大致估计,将对密码的选择具有一定的指导作用。本文介绍了基于熵对密码的强度进行估计的方法。

The password is the basis of electronic authentication.It＇s essential that password protection and password strength or anti-cracking capacity for the security of protected information or information systems.There is not an accurate method to define the password strength.Based on the concept of entropy,estimating roughly the password strength by using of guessing entropy and min-entropy,will has a guiding role for password selection.This article describes a method to estimate the strength of a password based on entropy.