security issue: DigiNotar root certificate hacked

[D. Hugh Redelmeier]

Much security on the internet is based on a tree of digital certificates.
The roots (note plural) are wired-in to browsers.

The DigiNotar root certificate has been hacked so it should not be 
trusted.

Browser updates will revoke the DigiNotar certificate.

If you cannot update your browser, you can revoke DigiNotar's root 
certificate by hand.  I just did that on my desktop (which is running a 
Fedora that is no longer supported).

In Firefox: Edit: Preferences: Advanced: Encryption: View Certificates:
Scan down for DigiNotar.
Click on the triangle next to it to open it up.  
Click on the only cert in it.
Click Delete.

I think that will do the job.  Better would be a Certificate Revocation 
List (CRL) entry, but I don't know how to do that.
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