tahoe-lafs/trac-2024-07-25
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Try to explain things 

[Imported from Trac: page NewCaps/Rainhill, version 9]
ccx 2024-01-30 19:43:31 +00:00
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NewCaps/Rainhill.md

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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> This is about What Could Go Wrong with the "Rainhill 3" immutable file caps: <http://jacaranda.org/tahoe/immutable-rainhill-3.svg>
Wayback Machine link: <https://web.archive.org/web/*/http://jacaranda.org/tahoe/>*
Explanation by ccx:
> 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.
>
> This is done by encoding separately the readcaps of items contained in the directory (Plain_R) and verifycaps of the same items (Plain_V).
>
> 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.
(<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.) (<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.)
![](attachments/NewCaps/Rainhill/immutable-rainhill-3.svg) ![](attachments/NewCaps/Rainhill/immutable-rainhill-3.svg)