one time password

基本解释

One solution for that is to use a one-time password (OTP) system.
这种情况的解决方案就是使用一次性密码（OTP）系统。
The hackers log into the user's bank account, quickly copying the one-time password if one is used.
黑客登录到用户的银行帐户，快速复制的一次性密码，如果有使用。
This paper analyzes some defects of the traditional S/KEY One-Time Password(OTP) authorization system, and proposes a new S/KEY authorization solution.
分析传统S/KEY型一次性口令认证系统的缺陷，提出一种新型的S/KEY认证方案，实现客户端与服务器的双向认证，可进行会话密钥协商，且每次认证产生不同的会话密钥。

Images can also be enjoyed by friends and family by issuing a one-time password to connect several smartphones simultaneously to the cameras.
ENGADGET: Olympus E-PL5 and E-PM2: Micro Four Thirds cameras with OM-D-like focusing, performance boosts (hands-on)
The most obvious one to adopt appears to be the user authentication and OTP (one-time-password) that has been in existence for some time and has seen a fair degree of success in preventing fraud.
FORBES: How much should you trust your mobile phone?