In 2013, targeted attacks increased, with spear-phishing attacks rising 91% over 2012. Watering hole attacks utilizing unpatched website vulnerabilities and zero-day exploits also grew. Eight data breaches exposed over 10 million identities each, termed "mega breaches". A total of 552 million identities were breached in 2013, over 5 times more than the 93 million in 2012. Web attacks blocked per day rose 23% from 2012. 78% of websites had vulnerabilities, and 16% had critical vulnerabilities that could be easily exploited by attackers.