Soft keypads are becoming a common technique to prevent key-logger attacks on sensitive input, such as the login PIN code for online banking services.
软键盘是防止键盘记录工具窃取敏感输入信息(比如说用于在线金融服务的登录pin码)的一个常用技巧。
After all, you don't need to input a PIN every time you use your credit card.
总之，在使用信用卡时，你不必每次输入个人识别码。
For instance, a PIN is necessary for every purchase, and if it is input incorrectly five times, the wallet disables.
例如，购买时需要输入个人识别码，而且一旦五次输入错误，钱包自锁。
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