Security Ledger Editor in Chief Paul Roberts talks about the recently discovered KRACK security hole in Wi-Fi Protect Access with Bob Rudis of Rapid7. Bob has some simple ideas to protect yourself from KRACK attacks. Also: Or Katz of Akamai discusses that firm's research into fast flux botnets, which morph and evolve to evade detection. Finally, Tim Jarrett of CA-Veracode talks about research in Apache Commons Collections, a common and vulnerable open source library that is used in millions of applications.