Analysis suggests that social, video and file sharing are not the top IT security threats, according to Palo Alto Networks In the 10th edition of its Application Usage and Threat report Palo Alto Networks the network security company, for the first time compiles and correlates data on application usage and threat activity. While 339 social networking, video, and filesharing applications represent 20% of network bandwidth use, they account for less than 1% of threat logs. Custom or unknown applications are the leading type of traffic associated with malware communications, accounting for 55% of malware logs, yet they are consuming less than 2% of network bandwidth.