Distributed denial-of-service (DDoS) attacks continue to grow in frequency, while attack bandwidth size is declining, according to Akamai’s second-quarter state-of-the-Internet security report. Among the key findings the study cited was a 132 percent increase in the total volume of second-quarter DDoS attacks, compared with the same period last year. In contrast, Akamai reported an 11 percent year-over-year decline in the average peak bandwidth in the second quarter. Although there was a decline in the average peak volume, that doesn’t mean there weren’t some very large attacks, including a dozen DDoS attacks that had peak attack volume of more than 100 gigabits per second. Akamai also reported that its network saw 56 percent of attacks come in over HTTPS (encrypted HTTP Web traffic) in the second quarter, up from only 9 percent in the first quarter of the year. Among the top HTTPS attack vectors was the Shellshock bug, which first emerged in 2014. Looking at the broader DDoS landscape, 90 percent of DDoS attacks targeted the infrastructure layer, while 10 percent affected the application layer. eWEEK examines some key findings from the study.