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Mastering ServiceNow - Second Edition by Martin Wood

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Authenticating and securing web services

Communication with a ServiceNow instance has two basic starting points:

  • It happens over HTTPS. This provides encryption for all the communication and helps prevent man-in-the-middle attacks.
  • Authentication is almost always required, usually in the form of a username and password. This ensures that the instance knows who you are.
  • Authorization is then applied. Using Security Rules and other mechanisms, the instance can decide if you are entitled to carry out a particular action.

Note

This section focuses on machine-to-machine authentication. The next chapter, explores authorization in much more detail.

Inbound authentication

When systems want to connect to ServiceNow, the most obvious and common way of authenticating ...

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