The digital sign technique is applied in many fields such as identify confirmation and information authentication on Internet.

数字签名技术可以提供网络身份认证等功能，具有广泛的应用。

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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。

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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。

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Not only the important information but also the entire Linux environment including authentication services is encrypted in ROM (Read Only Memory).

ENGADGET: Panasonic and Red Bend Software announce Android security partnership at MWC

Will the taxi driver app providers be upgrading their apps to utilize some form of initial authentication to ensure that only drivers get access to passenger location information?

FORBES: Smartphone Taxi E-Hail Apps: New Convenience or Potential Deathtrap

Warnings to users (perhaps at certain times and locations), initial authentication, background check requirements, reporting and logging pickup location information and details as to which drivers saw which passenger signals, as well as logging all driver locations on an ongoing basis are some initial suggestions.

FORBES: Smartphone Taxi E-Hail Apps: New Convenience or Potential Deathtrap