Robert Graham is a well-known cybersecurity. He created the BlackICE personal firewall in 1998, and created the first network intrusion prevention system (IPS). He's also known for creating "sidejacking" of session cookies from the network. Recently, he's known for masscan, which can scan all 4 billion addresses of the Internet within a few minutes. He regularly blogs at https://blog.erratasec.com on technical topics, cyber rights, and tech policy.