Self Signed Projects


G

Guest

I have created a certificate to self sign a project. Users of the code
install the certificate in their "Trusted Root Certification Authorities"
folder. After the appropriate warning, of course.

Microsoft says
(http://office.microsoft.com/en-us/excel-help/create-your-own-digital-certificate-HP005249558.aspx),
"Microsoft Office will only trust a self-signed certificate on a computer
that has the private key for that certificate available (generally only the
computer that actually created the certificate, unless the private key is
shared with other computers)."

Question 1: Does that mean that even if they install my certificate in the
trusted location that they cannot have their macro security set on high?

Question 2: How does one share the private key?

Question 3: Does that mean that the computer it is shared with can also
sign projects and make them look like they came from me?


Thanks!!
 
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G

Gord Dibben

You cannot export the key for SelfCert signatures to other stand-alone
computers.

Only good for use on the computer on which they are created.

If on a network with a shared store the key will be available to all.

I don't run on a network so cannot suggest how to set up a shared store.

But, you do not need the signature if users store your workbook in a "Trusted
Location"

I do not mean "trusted root certification authorities" in MMC

I mean in Excel under Button>Excel Options>Trust Center>Options>Macro Security.


Gord Dibben Excel MVP
 

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