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al4629740
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Explaining Digital Certificate and Signatures

I'm trying to understand what a digital certificate is and why I need it to sign a document.  I know in the following instructions I can create my own digital certificate for free, but when and how do I use a digital certificate to sign something?  What is a digital signature in comparison to taking a picture of my signature and pasting it.  

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Sam Jacobs

8/22/2022 - Mon
Sam Jacobs

A document signing certificate is used to prove to a user the identity of the creator of a digital resource,
For example, I use my document signing certificate  when I create PowerShell scripts, which adds a digital signature block with a hash to the bottom of my scripts.
This digital signature block does two things:
- It identifies me to the user running the script (if they don't trust me, they should not run the script), and
- It gives the user confirmation that the script has not been modified in any way (or the hash will not match).
al4629740

ASKER
so how does it relate with an average person signing a pdf or excel sheet?
Sam Jacobs

If you send me a signed .PDF or .XLS, I know that it was truly sent by you and that it wasn't altered along the way. The same holds for a signed email.
Your help has saved me hundreds of hours of internet surfing.
fblack61
al4629740

ASKER
I understand that but what am I using to do that?  Is it a third party program?
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Sam Jacobs

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