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Re: [Duplicity-talk] Feature request/discussion: Store identical files o
From: |
Kenneth Loafman |
Subject: |
Re: [Duplicity-talk] Feature request/discussion: Store identical files only once |
Date: |
Wed, 25 Jun 2008 06:20:34 -0500 |
User-agent: |
Thunderbird 2.0.0.14 (X11/20080505) |
Peter Schuller wrote:
> I generally like the idea. The problem I see is security. I'd be fine usng
> this on e.g. my own home directory. But more general use can be quite
> sensitive. One may allow for accidental hash collisions being sufficiently
> unlikely that you can ignore the problem; but in the presence of malicious
> intent you are also relying on the security of the hash algorithm -
> especially given the various ways that information of the sort that "user X
> has a file Y with checksum Z" might possibly be leaked to third parties.
The hash collision and malicious intent problems can be fairly easily
avoided by storing a pair of hashes (say MD5 and SHA1) which both have
to match, along with a checksum for the meta-data record.
...Ken
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- [Duplicity-talk] Feature request/discussion: Store identical files only once, Daniel Hahler, 2008/06/23
- Re: [Duplicity-talk] Feature request/discussion: Store identical files only once, Olivier Croquette, 2008/06/23
- Re: [Duplicity-talk] Feature request/discussion: Store identical files only once, Jacob, 2008/06/23
- Re: [Duplicity-talk] Feature request/discussion: Store identical files only once, Chris Knight, 2008/06/24
- Re: [Duplicity-talk] Feature request/discussion: Store identical files only once, Alexander Boström, 2008/06/24
- Re: [Duplicity-talk] Feature request/discussion: Store identical files only once, Alexander Boström, 2008/06/24
- Re: [Duplicity-talk] Feature request/discussion: Store identical files only once, Jacob, 2008/06/24
- Re: [Duplicity-talk] Feature request/discussion: Store identical files only once, Peter Schuller, 2008/06/25
- Re: [Duplicity-talk] Feature request/discussion: Store identical files only once, Alexander Boström, 2008/06/25
- Re: [Duplicity-talk] Feature request/discussion: Store identical files only once,
Kenneth Loafman <=
- Re: [Duplicity-talk] Feature request/discussion: Store identical files only once, Olivier Croquette, 2008/06/26
- Re: [Duplicity-talk] Feature request/discussion: Store identical files only once, Olivier Croquette, 2008/06/26
- Re: [Duplicity-talk] Feature request/discussion: Store identical files only once, Jacob, 2008/06/24