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-   -   How to use Digital Signatures (https://www.excelbanter.com/excel-programming/307532-how-use-digital-signatures.html)

Mike NG

How to use Digital Signatures
 
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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JK

How to use Digital Signatures
 
Mike,

The obvious answer is to purchase it from Verisign. It's about $450 a year.
But hopefully someone provides you a cheaper way because I would have an
interest too.

Jim Kobzeff

"Mike NG" wrote in message
...
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
Please post replies to newsgroup to benefit others
Replace dead spam with ntl world to reply by email




Mike NG

How to use Digital Signatures
 
On Fri, 20 Aug 2004 at 00:52:46, JK (JK ) wrote:
The obvious answer is to purchase it from Verisign. It's about $450 a year.
But hopefully someone provides you a cheaper way because I would have an
interest too.

I think I'll forget it then
--
Mike
Please post replies to newsgroup to benefit others
Replace dead spam with ntl world to reply by email


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