Junaid Hussain a.k.a Abu Hussain al-Britani is a British black hat hacker and terrorist hacker who supported the Islamic State of Iraq and the Levant (ISIL). Hussain, who grew up in Birmingham, was jailed in 2012 for hacking Tony Blair's accounts and posting his personal information online. Hussain left the UK around 2013 for Syria, and was at one point suspected of being the infamous executioner "Jihadi John".
As part of Isis “Cyber Caliphate”, Hussain is also believed to have aided Isis in obtaining the passwords of the US Central Command’s Twitter and YouTube accounts in January and briefly using them to send pro-Isis messages.