OneTimePasswordAlgorithm 一次一密算法，实现动态口令牌的算法。-One Time Password Algorithm

OTP全称叫One-time Password,也称动态口令，是根据专门的算法每隔60秒生成一个与时间相关的、不可预测的随机数字组合，每个口令只能使用一次，每天可以产生43200个密码-OTP full name is One-time Password, also known as dynamic password, is based on a special algorithm every 60 seconds to generate a time related, unpredictabl