About PGP Signing a File.

[John Dangler]

On Sun, 2007-02-11 at 09:15 +0000, Tony Arnold wrote:
> 
> Matthew Flaschen wrote:
> > Joel Bryan Juliano wrote:
> >> Hi,
> >>
> >>  I have a question regarding signing a file or binary, I installed
> >> Seahorse which is really awesome tool! And it has a nautilus-extension
> >> that easily Encrypt and Sign a file or directory by right-clicking the
> >> file. Can someone please tell me the use of signing a binary file or
> >> directory? I know it's important, but I really don't get it.
> > 
> > There's no use, unless you're planning on sending the file to someone.
> > If you do send it to someone, they can check the signature to verify you
> > sent it.  Emails and most forms of electronic communication can be
> > easily forged, but signatures can't be.
> 
> Verifying the signature also confirms that the file has not been
> modified since you signed it but some malicious person. So it acts a bit
> like an MD5 checksum with the added benefit that you can check who
> signed it.
> 
> Regards,
> Tony.
So, how can I get a valid signature that I can put in my evolution
emails?

> -- 
> Tony Arnold, IT Security Coordinator, University of Manchester,
> IT Services Division, Kilburn Building, Oxford Road, Manchester M13 9PL.
> T: +44 (0)161 275 6093, F: +44 (0)870 136 1004, M: +44 (0)773 330 0039
> E: tony.arnold at manchester.ac.uk, H: http://www.man.ac.uk/Tony.Arnold
>