Several successful hacks of VeriSign’s network, in 2010, might have compromised critical information relating to the Internet’s domain name system. The attacks occurred before some assets of the company were acquired by Symantec in 2010. Security experts say data breaches are now so widespread that being breached is a question of when, not if. The hack echoes 2011 attacks against certificate registrars Comodo and DigiNotar, both of which appeared to be executed by–or on behalf of–one or more nation states.”]
Source: https://www.darkreading.com/attacks-breaches/verisign-2010-hack-dns-data-theft-a-possibility