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September 21, 2004
Accountability is Cheaper than Access Control
Jon Udell writes about using accountability to augment access control. Jon is working from Dan Geer's script. Dan has said that accountability scales linearly while access control scales at least as the square. For many applications, simply being able to audit what's happened to a resource (who accessed it, where was it sent, etc.) is sufficient and that's a lot cheaper than trying to build access control lists for every resource in your enterprise.
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Cutting Atom Feeds Down to Size
Through Sam Ruby, a pointer to mod_speedyfeed, an Apache 2 module that allows feedreading clients to only download the entries that have changed since the last access instead of the entire RSS file. This could cut the transfer amount significantly for many syndication sources. For now, it just works for Atom, but I don't see anything about it that couldn't work for RSS as well. The module is triggered by a header that the he client adds to the request like so:
GET /asdf/atom.xml HTTP/1.1 Host: asdf.blogs.com If-Modified-Since: Fri, 17 Sep 2004 00:18:36 GMT A-IM: feed