If one password test takes twice as long, the total password cracking time takes twice as long.

如果一次密码校验需要两倍时间，那整个密码破解时间也要两倍。

youdao

The only way an attacker can break your encryption is to compare a very long list of strings to your encrypted password, one at a time, until a match is made.

攻击者破坏加密的惟一方法是将一个非常长的字符串列表与您的加密密码进行比较，每次比较一个，直到找到匹配项。

youdao

We needed to ensure valid users get the pages they need, but without prompting for a username and password every time they request one — just once per session.

我们需要确保有效的用户得到他们需要的页面，但不必在每次他们请求一个页面时都提示用户名和密码—每个会话只提示一次。

youdao

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?

The card has touch-sensitive buttons and the ability to create a "one-time password" - doing away with the need for a separate device sometimes needed to log in to online banking.

BBC: New Mastercard has LCD screen and keyboard

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)