ok
have you ever thought about webcache and your encryption idea ?(
1) User A establish a conection to user B.
2) They are generating a key for secure data transfer
3) User A encrypt the data chunk with the key
4) User A send the encrypted data to the proxy of the IPS from user B
4) The Proxy send is forward to user B
5) User B decryt th data and is funny
6) Data is storred on the proxy server
7) User C want to get them ... but the key?
Sorry for that now. I've realised after I finished my list, that user B can send user C the key for the proxy data. But I post it nevertheless. It can be that it possibly whom helps.