Try to explain things
[Imported from Trac: page NewCaps/Rainhill, version 9]
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This is about What Could Go Wrong with the "Rainhill 3" immutable file caps: <http://jacaranda.org/tahoe/immutable-rainhill-3.svg>
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Wayback Machine link: <https://web.archive.org/web/*/http://jacaranda.org/tahoe/>*
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Explanation by ccx:
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> What I assume this to be is an encoding scheme for immutable directories that allows deriving deep-verify capability so that whole directory tree below can be verified recursively.
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> This is done by encoding separately the readcaps of items contained in the directory (Plain_R) and verifycaps of the same items (Plain_V).
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> By applying this scheme to the plaintexts together with convergence secret (CS) and encoding parameters you will get two encryption keys EncK_R and EncK_V for each part respectively.
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(<http://jacaranda.org/tahoe/immutable-rainhill-3.png> or [download the attached SVG](../raw/attachments/NewCaps/Rainhill/immutable-rainhill-3.svg) if your browser does not correctly handle SVG.)
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![](attachments/NewCaps/Rainhill/immutable-rainhill-3.svg)
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