gnupg and corrupted files

[Bob Mathews]

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On Thursday 14 November 2002 10:55, Bram Vandoren wrote:
> I want to encrypt some large backup files (650MB) and store them on a c=
dr.=20
> What will happen when there are errors on the cd? Is gnupg able to decr=
ypt=20
> the files (except the sections with an error) or are my files completly
> lost?

If the file was encrypted with no compression (--compress-algo 0 on the=20
command line), the uncorrupted parts will decrypt correctly, minus one (8=
 or=20
16 byte) cipher block. I just tried this, and it works. If compression wa=
s=20
used, or the file was compressed to begin with, recovering the data after=
 the=20
corruption is difficult or impossible.

If the file is signed, the signature will fail to verify, of course.

 -bob mathews

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=3D/Ui4
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