This was probably the most effective countermeasure: "Knowing that they would be hacked, the campaign forged emails and fake documents themselves to confuse th

This was probably the most effective countermeasure: "Knowing that they would be hacked, the campaign forged emails and fake documents themselves to confuse the hackers with irrelevant and even deliberately ludicrous information. By placing false flags, the campaign wished to inundate, confuse, and impede the work of the hackers with false information and slow them down. The campaign’s strategy of “counter-retaliation for phishing attempts”11 is known as cyber or digital blurring. It worked by turning the burden-of-proof tables on the hackers. The Macron campaign staff did not have to explain potentially compromising information contained in the Macron Leaks; rather, the hackers had to justify why they stole and leaked information that seemed, at best, useless and, at worst, false or misleading. The whole thing made the population doubt the authenticity of any of the leaked material."