A communication network is operated by associating a pseudonym with a user
of the communication network at a proxy searcher. A complex search
request from the user is received at the proxy searcher, the complex
search request being associated with the pseudonym. The complex search
request and pseudonym are forwarded from the proxy searcher to a central
searcher. The complex search request is divided into a plurality of
simple search requests at the central searcher. The plurality of simple
search requests are performed on at least one database. The results of
the plurality of simple search requests are provided to the proxy
searcher, the results being associated with the pseudonym.