Itzik Kotler
[12] In 2009, Kotler (along with colleague, Tomer Bitton) demonstrated at DEF CON how a hacker could feasibly spread malware through software updates for applications like Skype.At the conference, Kotler and Bitton released a tool known as Ippon ("game over" in judo parlance) that could ask users on a public Wi-Fi network to update a specific application.In May 2011, Kotler presented at the HackInTheBox conference in Amsterdam where he demonstrated how a Stuxnet-like malware could physically destroy servers in a permanent denial-of-service (PDoS) attack.[13] Later in 2011, Kotler and Iftach Ian Amit presented at DEF CON, demonstrating how a bot master could communicate with botnets and with "zombie machines" using VoIP conference calls.Their open-source software, Moshi, illustrated how they could send instructions to and receive data from botnets and infiltrated networks using any phone line (including payphones).