WAS v8.5 > Secure applications > Secure web services > Secure web services > Web Services Security concepts > Web Services Security concepts for v5.x applicationsTrusted ID evaluator
The trusted ID evaluator is an abstraction of the mechanism that evaluates whether the given ID name is to be trusted. The trusted ID evaluator is typically used by the eventual receiver in a multi-hop environment.
There is an important distinction between v5.x and v6.0.x applications. The information in this article supports v5.x applications only used with WebSphere Application Server v6.0.x and later. The information does not apply to v6.0.x applications.
Depending upon the implementation, we can use various types of infrastructure to store a list of the trusted IDs, such as:
- Plain text file
- Database
- LDAP server
The Web Services Security implementation (com.ibm.wsspi.wssecurity.id.TrustedIDEvaluator) invokes the trusted ID evaluator and passes the identity name of the intermediary as a parameter. If the identity is evaluated and deemed trustworthy, the procedure continues. Otherwise, an exception is created and the procedure is stopped.