On Tue, Mar 18, 2008 at 09:46:45AM -0700, Jon Callas wrote:

> What operates like a block cipher on a large chunk?
> Tweakable modes like EME.

Or as a non-patented alternative one could use the Bear/Lion
constructions [1], which can encrypt arbitrary size blocks at
reasonably good speeds (depending on the performance characteristics
of the stream cipher and hash function they are instantiated with).


[1] http://www.cl.cam.ac.uk/~rja14/Papers/bear-lion.pdf

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