Researchers have found that the Tour de France could potentially be compromised by hackers taking advantage of vulnerabilities in wireless groupsets, presenting a possible new form of cheating. Three 'no-trace' weaknesses were discovered in Dura-Ace Di2, but the researchers are now cooperating with Shimano to provide a solution.
Remote control of gearing as a form of mechanical doping
https://www.cyclingnews.com/news/shimano-di2-wireless-hacking/