Your browser trusts many certification authorities and sub-authorities quietly, every time you enter an HTTPS website. This add-on for advanced users reveals when certificates are updated, so you can ensure it was a legitimate change.
a spreadsheet with a list of 531 entries on the currently known bad DigiNotar related certificates.
During my attempt to verify and understand who stands behind the sending of fraudulent “reminder†email messages tricking our customers, I created a certificate from the source I was following. And my certificate was issued without any further questions.
KeyManager Tool: Firefox Add-on for Key Generation, Certificate Enrollment, CRL Signing, and Identity and Authority Delegation
Das Zurückziehen (Revoke) eines digitalen Zertifikats führt nicht automatisch dazu, dass damit alle getätigten Signaturvorgänge etwa für Software ungültig werden. Entscheidend ist vielmehr das Revocation Date, das festlegt, ab welchem Zeitpunkt ein Unterschriftsvorgang als ungültig eingestuft wird.
Securely bypasses Firefox HTTPS security errors by verifying certificates using a collection of Network Notaries. See http://www.cs.cmu.edu/~perspectives/