Hal and others interested in HTTP proxying: I've just found an interesting alternative to CERN httpd at http://excalibur.usc.edu/ . I haven't yet played with it, but it looks promising. Caching should also play a useful role defeating traffic analysis, besides increasing the throughput. [...] HIERARCHY The Harvest cache implements hierarchical caching: your cache at home can resolve URLs through your lab cache, which in turn can resolve requests through your institutional cache, which in turn can resolve requests through your regional network cache. The cache resolution algorithm, at each stage in the hierarchy, distinguishes parents from neighbor caches. A parent cache is a cache higher up the hierarchy, while a neighbor cache is one at the same level in the hierarchy. [...]