Messages in this thread |  | | | From | "Matthew J. Fanto" <> | | Subject | Re: The Ext3sj Filesystem | | Date | Fri, 1 Nov 2002 00:14:10 -0500 |
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On Thursday 31 October 2002 11:41 pm, Theodore Ts'o wrote:
> First of all, have you considered trying to do this as a stacking > filesystem?
Yes, I spoke to Christoph Hellwig the other day and he suggested the same thing. I will be taking a look at a stacking filesystem tonight/tomorrow.
> Secondly, the really critical question is key management. What > happens if the user gets the key wrong? Will he/she know? Or will > they just get garbage if the read from the file, and be able to trash > the file if they write to the file with the incorrect key? Using some > kind of key-ID and some way of validating that the key is correct > before the user does start accessing files would probably be a really > good idea.
It wouldn't be very hard to alert the user of an incorrect key using a message digest (SHA1). So far, I haven't implemented this feature, but I will if enough people want it.
> Finally, if you do want to allocate some additional fields in the ext2 > inode, superblock, etc., please coordinate with me, so we can avoid > conflicts as much as possible. Thanks!!
Yes, there will be a need for additional fields specifying things such as the algorithm to use.
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