[tahoe-dev] [tahoe-lafs] #217: DSA-based mutable files -- small URLs, fast file creation
tahoe-lafs
trac at allmydata.org
Tue Feb 3 15:33:39 PST 2009
#217: DSA-based mutable files -- small URLs, fast file creation
----------------------------+-----------------------------------------------
Reporter: zooko | Owner: zooko
Type: enhancement | Status: assigned
Priority: major | Milestone: eventually
Component: code-mutable | Version: 0.7.0
Keywords: mutable crypto | Launchpad_bug:
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Comment(by zooko):
The next step on this ticket is to write up a proof of security of the
scheme. George Danezis and Ian Goldberg's recent work on {{{"Sphinx"}}}
might be a good model to follow, as they used a nearly identical
construction to achieve rather different security properties :-)
http://eprint.iacr.org/2008/475.pdf Loosely speaking, {{{Sphinx}}} is
about encrypting where {{{semi-private keys}}} is about signing. I think.
Also perhaps vaguely relevant is Dan Brown's recent publication on "The
One-Up Problem in (EC)DSA" http://eprint.iacr.org/2008/286.ps .
I would be extremely grateful if a real cryptographer who has experience
writing such papers were to volunteer to help.
However, I've resolved to stop being a scaredy-cat about it and just do my
best. It really shouldn't be ''that'' hard to do.
--
Ticket URL: <http://allmydata.org/trac/tahoe/ticket/217#comment:35>
tahoe-lafs <http://allmydata.org>
secure decentralized file storage grid
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