In addition, the one-time authentication code expires immediately after completion of a transaction.

而且，交易完成后，一次性验证码就失效了。

youdao

I chose its ClientToken version (in Listing 4) to create a one-time authentication token appropriate for purposes of this example.

我选择了它的ClientToken版本(如清单4所示)来创建一次性的身份验证token，这适合于本例的目的。

youdao

Henan Electronic Port Comprehensive Service Center has realized "one portal for entry, one-time authentication for login and one-stop service".

河南电子口岸综合服务中心已实现“一个门户入网、一次认证登陆、一站式服务”。

youdao

Most of these transactions involve SMS based payments, direct mobile billing using PIN and one time password authentication and mobile web payments.

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In addition to capturing regular passwords, man-in-the-middle attacks can be used to intercept one-time passcodes offered by traditional two-factor authentication systems.

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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.

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