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[Imported from Trac: page NewCaps/WhatCouldGoWrong, version 9]
davidsarah 2009-10-11 01:35:12 +00:00
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NewCaps/WhatCouldGoWrong.md

@ -19,7 +19,9 @@ This is about What Could Go Wrong with the "Elk Point 2" immutable file caps: <h
where *k* = bitlength(*K1*), *n* = bitlength(*R*), *t* = bitlength(*T*), *u* = bitlength(*U*), *d* = bitlength(*KD*).
1. *shape-shifter immutable file*: creator creates more than one file matching the immutable file readcap
2. *roadblock*: attacker prevents uploader (including repairer) from being able to write a real share into the right storage index; *speedbump*: attacker adds his bogus share into the list of shares stored under the storage index by the same method; downloader has to download, examine, and discard the bogus (*K1enc*,*Dhash*,*V*)'s until it finds the real one
3. *undeletion*: attacker makes a deleted file (for which it need not have had a read cap) accessible at its previous storage index, and readable by previous read caps
<http://allmydata.org/pipermail/tahoe-dev/2009-October/002959.html>