impersonation
Technology› E-mail› Microsoft Email› Microsoft Exchange
Microsoft Exchange 2007
The ability of a thread to run in the security context of a security principal different from the security principal that started the process. This is usually so that a process can gain access to resources on behalf of a user. [Exchange 2007]
The ability of an operating system process or thread to run temporarily in the security context of a specific caller and gain authorized access to resources using that identity.
Java
An act whereby one entity assumes the identity and privileges of another entity without restrictions and without any indication visible to the recipients of the impersonator's calls that delegation has taken place. Impersonation is a case of simple delegation.