A troublesome area is the management of the keys used for encryption and authentication.

一个麻烦的领域是用于加密和身份验证的密钥的管理。

AAA information file can be used not only for identity mapping but also for authentication and authorization.

AAA 信息文件不仅可用于身份映射，还可以用于身份验证和授权。

The authentication mechanisms' implementation might have weaknesses and allow, for example, credential interception and replay.

身份验证机制的实现可能存在弱点，比如准许凭证拦截和重播。

The system login uses information such as source ID (SID), domain and system user name for authentication, so it is considered secure.

系统登录会使用到诸如源 ID（安全识别符），域和系统用户名等信息进行身份验证，因此被认为是安全的。

One submits the method of ID authentication based on proxy ARP.

有人提出了基于代理 ARP 的 ID 认证方法。