By Mihai Lazarescu The attack was aimed at the Krebs on Security website, a well established source of valuable information on cyber crime. What was remarkable about this particular attack was the sheer volume of traffic involved. According to the author himself, the attack reached around 620 gigabits per second, which is nearly twice the amount seen in the previous record-breaking DDoS attack. To put things in perspective, this is like the website being hit by one and a half Blu-ray discs’ worth of data every second. The average DDoS in 2014 involved traffic of around 7.5Gb/s, and yet only two years later the volume has increased by a factor of 10-15. The sustained attack eventually forced the website’s DDoS protection provider, Akamai cloud services, which had been providing security for the site free of charge, to admit that it could not handle that sort of attack pro bono, and thus the Krebs on Security site had to move. However, since the Krebs attack, there has been a claim made of yet another attack that involved more than 1 terabit per second of traffic. The claim is currently being investigated, and if it is confirmed, it highlights the challenge that organisations face in dealing with massive DDoS attacks. Apart from the record volume of data involved, the Krebs attack also set an unfortunate precedent by forcing a high-profile security website offline for several days. The attack was successful and has demonstrated the vast potential of this type of weaponised DDoS attack.