http://www.tarsnap.com/kivaloo.html http://www.tarsnap.com/kivaloo.html The author is pretty active here on HN. Very well documented design and goals. Also w

http://www.tarsnap.com/kivaloo.html http://www.tarsnap.com/kivaloo.html The author is pretty active here on HN. Very well documented design and goals. Also well documented for what problems it does not solve. I think around 20k LOC. Seems pretty non-trivial.