Chris Roberts, who has demonstrated hacking many devices at Blackhat conferences, denies the claim and has tweeted

Over last 5 years my only interest has been to improve aircraft security...given the current situation I've been advised against saying much

— Chris Roberts (@Sidragon1) May 17, 2015

The FBI is reported to have interviewed Roberts a number of times in a recently published article on APTN, a Canadian news outlet. According to the article Roberts claimed he took control of an aircraft

Just one month ago, a GAO report warned of a vulnerability on aircraft where they claim that the avionics could be accessed through the entertainment system as they are connected through a common infrastructure. The GAO report was widely disputed by many industry experts as I detailed in a previous blog post.

This second incident has made me revisit the topic and makes me question whether or not I will be safe on my next flight. Once again, my conclusion is that I am. Here’s why:

• The original conclusion that the two networks are not connected was based on expert commentary from Dr. Phil Postra a qualified pilot and professor of digital forensics at Bloomsburg University.

• There is speculation that newer aircraft, specifically the Boeing 787 DreamLiner may have a single onboard network but experts say that even on these aircraft the flow of data is one way from the cockpit to the passenger network and that no traffic can fly in the opposite direction. This has been a speculative issue for the last 7 years, see this Fox news story.

• The aircraft that Roberts reportedly hacked was ‘older’ and had the standard of separate networks for Avionics and Entertainment, which would imply that the hack may not have happened at all and may have just been a bit of bragging.

• Since this story took to the mainstream press last month, I am certain that manufacturers of aircraft have tested and re-tested the security of the avionics systems and if necessary made the necessary changes. In fact, Roberts may have made the systems even more secure with just the rumor of a hack.

• Lastly, aircraft are fitted with the ability for the pilot to take manual control and fly by wire, this is done through a disconnect switch in the cockpit. In the remote possibility someone did manage to mess with the avionics then I would trust one of the pilots to take control.

While there maybe doubt, speculation and differing views, there are many other systems that could potentially be hacked to disrupt a flight such as air traffic control systems or satellite positioning systems. These could be attacked from the ground and not require a hacker to be on board. It seems far more likely to me, that these would be the target of a person with malicious intent.

Will I be boarding an aircraft soon? Yes, next week. If the person sitting next to me gets out a screw driver and starts taking his seat apart to access networks cables I will call the crew over  and ask them to inform the pilot, I trust you will do the same.