Tag Archives: Certificates

The consequence of not renewing ATA certificate in time

Posted on 13 January, 2020 by Tom Aafloen

A customer who uses Microsoft Advanced Threat Analytics (ATA) recently had severe issues with their ATA implementation. At first, the portal started to behave strangely, not showing all information in alerts and some configuration settings were missing. After a restart … Continue reading →

Posted in ATA, Certificates, PKI, SSL | Tagged , | 2 Comments

What is the difference between the formats "DER encoded" and "Base64 encoded" when exporting a certificate?

Posted on 6 March, 2014 by Tom Aafloen

I am often asked what the difference between the following certificate export options are: The first option exports the certifcate encoded in the format Distinguished Encoding Rules, which is a binary format. The second option exports the certificate encoded with … Continue reading →

Posted in Certificates, PKI | Tagged , , , , , , , | 6 Comments

Delete certificates on smart cards

Posted on 7 March, 2013 by Tom Aafloen

If you want to delete existing certificates on a smart card, follow these steps: Start PowerShell (or cmd, since we do not actually use PS-commands) Insert the smart card in a reader Run the command certutil -scinfo Enter PIN if … Continue reading →

Posted in PKI, smart card | Tagged , | Leave a comment

Which Root CAs do you really trust?

Posted on 31 January, 2013 by Tom Aafloen

When I ask people which Root CAs they trust, they usually show me the list in Trusted Root Certification Authorities. Like this one, from a freshly installed Windows Server 2012: But that is actually not the entire truth. If I … Continue reading →

Posted in PKI | Tagged , , , , , , | 2 Comments