Every Forensic Note and Forensic Notebook is Digitally Signed by a Digital Signing Certificate issued by Comodo, a Certificate Authority (CA). By default, Adobe Reader / Acrobat do not have knowledge of the certificate which results in the warning “At least one signature has problems” (as shown below).
To properly validate your Forensic Notes and Forensic Notebooks, follow the steps outlined below which will add the Digital Signing Certificate to your list of Truststed Certificates. The following steps only need to be completed once on each computer viewing Forensic Notes and Notebooks.
NOTE: The following instructions are for Adobe Acrobat Reader CS. Other versions of Adobe Acrobat will have similar features and options.
Step #1 – Signature Panel
1. Click on “Signature Panel”
2. Click the dropdown menu next to “Validate All”
3. Click on “Validate Signature”
4. Click the “Signature Properties…” button
Step #2 – Signature Properties
The following menu shows the properties of the Digital Signature. As shown, the Forensic Note has not been modified since it was Digitally Signed.
1. Click the “Show Signer’s Certificate…” button
Step #3 – Certificate Viewer – Summary
The following menu shows further information related to the Digital Certificate.
1. Click the “Trust” tab
Step #4 – Certificate Viewer – Trust
The following menu shows that the associated Digital Certificate is not trusted.
1. Click the “Add to Trusted Certificates…” button
Step #5 – Add Trust Settings
This following menu allows you to set the Trust level for the Digital Certificate associated with Forensic Notes and Notebooks. To properly validate Forensic Notes and Notebooks, you only need to ensure that the following two (2) options are selected:
1. Use this certificate as a trusted root
2. Certified documents
3. Click “Ok” to save changes
Step #6 – Validate Signature
Now that the Digital Certificate is trusted within Adobe Reader/Acrobat, the Forensic Note or Notebook must be re-validated as it will continue to show errors until completed.
1. Click on menu icon next to “Validate All”
2. Click on “Validate Signature”
The Digital Signature will be re-validated now that the Digital Certificate is trusted.
Step #7 – Valid Signature
The Signature Panel should now show the following message:
“Signed and all signatures are valid”
View List of Trusted Certificates – Adobe Reader
To view the list of Trusted Certificates within Adobe Reader, following these steps:
1. Click “Preferences…” within “Edit” menu
2. Click “Signatures”
3. Click “More…” button within “Identities & Trusted Certificates”
4. View list of Trusted Certificates