From: Zooko O'Whielacronx Date: Mon, 13 Apr 2009 16:08:37 +0000 (-0700) Subject: docs: a few edits/updates about dirnodes X-Git-Tag: allmydata-tahoe-1.4.0~4 X-Git-Url: https://git.rkrishnan.org/Site/Content/Exhibitors/frontends?a=commitdiff_plain;h=a2f34b4e1a36a70333019825c7f6f73e69c91da0;p=tahoe-lafs%2Ftahoe-lafs.git docs: a few edits/updates about dirnodes --- diff --git a/docs/specifications/dirnodes.txt b/docs/specifications/dirnodes.txt index 7023f86c..dff41ecd 100644 --- a/docs/specifications/dirnodes.txt +++ b/docs/specifications/dirnodes.txt @@ -238,7 +238,7 @@ How well does this design meet the goals? -=== Confidentiality leaks in the vdrive server === +=== Confidentiality leaks in the storage servers === Dirnode (and the mutable files upon which they are based) are very private against other clients: traffic between the client and the storage servers is @@ -259,7 +259,7 @@ attacker may be able to build up a graph with the same shape as the plaintext filesystem, but with unlabeled edges and unknown file contents. -=== Integrity failures in the vdrive server === +=== Integrity failures in the storage servers === The mutable file's integrity mechanism (RSA signature on the hash of the file contents) prevents the storage server from modifying the dirnode's contents @@ -268,8 +268,8 @@ unavailable, but not corrupt it. A sufficient number of colluding storage servers can perform a rollback attack: replace all shares of the whole mutable file with an earlier version. -TODO: To prevent this, when retrieving the contents of a mutable file, the -client should query more servers than necessary and use the highest available +To prevent this, when retrieving the contents of a mutable file, the +client queries more servers than necessary and uses the highest available version number. This insures that one or two misbehaving storage servers cannot cause this rollback on their own.