general gnutella security question

Hello group,
I have a question about general gnutella development. I understand that
there are some reasons why using key words for the query routing protocol.
First, that it establishes a more general way to search for files, as you
are not using the entire and precise names of the files, but only the
keywords, so that you avoid misspelling. The second reason is security. Am I
correct that the main purpose of hashing the key words is that other peers
don't know the exact names of the files that a peer is sharing? In that way,
the protocol can avoid untrusted peers get knowledge of what legal or ilegal
files the peer is sharing? and is it for the purpose of not only hiding
ilegal stuff, but also avoiding any kind of attacks?
please somebody help me out with this.
Regards,
Miguel


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