A Dutch certificate authority that suffered a major hack attack this summer has been unable to recover from the blow and filed for bankruptcy this week.

DigiNotar, which is owned by Illinois-based Vasco Data Security and was the primary provider of digital security certificates for domains owned by the Dutch government, was breached in early June due to lax security.

The breach allowed the intruder to trick DigiNotar’s system into issuing him more than 500 fraudulent digital certificates for top internet companies like Google, Mozilla, and Skype. This meant that users who went to a supposedly s...