The advice can contain the authentication code or, as in this case, it can invoke another method.

通知可以包含认证代码，或者就像在这个示例中一样，可以调用其他方法。

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See the Resources section to learn more about code source access control and authentication in JAAS.

请参阅参考资料部分以了解更多关于JAAS中代码源访问控制和认证的信息。

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Listing 6 shows sample code to enable preemptive authentication.

清单6中显示的样例代码可以启用先占式认证。

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Authentication can be done via code entry or NFC (or there's WPS too).

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This increases the level of security by preventing reverse engineering of an authentication service process or preventing attacks that try to modify this code.

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Finally, the plan makes multi-factor authentication available to website owners for the cost of adding a few lines of software to their server code.

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