A system and method for preventing an administrator impersonating a user from accessing sensitive resources on a target system is provided. The method comprises receiving a first request from a user to change the user's password on a target system to be changed, sending a “change password” request for the user to the target system, storing the user's new password, receiving a second request from the target system on behalf of the user for access to a sensitive resource, wherein the second request contains information about the user's password, and denying the second request if the information about the user's password is not consistent with the user's stored new password.