Do they service a useful purpose?

I wanted to test something else out on my machine, so I backed up my
system with DriveImage. within VBA I looked in
Tools - Digital Signature - Choose
I had no certificates

Then installed selfcert, made a certificate, attached it to a
spreadsheet via Choose, saved it to floppy

I then restored my system, checked in Choose, and there were no
certificates, but when I opened my spreadsheet it told me it was signed
without the need for the certificate

I thought the idea of certificates were to install them into the trusted
source or whatever. I can't really see how I can genuinely trust
certificates that have my name in cos they may be forged and it just
seems like a variation on the theme that "this spreadsheet contains
macros"


Is there a better way of managing Digital Signatures so only I can
install certificate, and only files signed with that certificate can be
trusted
--
Mike
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