[*] Linus Torvalds got the idea of a Cryptographic Hash Function
Directed Acyclic Graph structure from an earlier distributed
revision control tool named Monotone.
OT trivia: The idea actually predates either monotone or git;
opencm (http://opencm.org/docs.html) was using a similiar technique
for VCS access control a year or two prior to monotone's first
release.
Note that I didn't say Monotone invented it. :-) Graydon Hoare of
Monotone got the idea from a friend of his who, as far as we know,
came up with it independently. I personally got it from Eric Hughes
who came up with it independently. I think OpenCM got it from the
Xanadu project who came up with it independently. :-)
Getting back towards topic, the hash function employed by Git is showing
signs of bitrot, which, given people's desire to introduce malware
backdoors and legal backdoors into Linux, could well become a problem in
the very near future.
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