France says it was the subject of 24,000 cyber-attacks against defence targets last year.

Defence Minister Jean-Yves Le Drian said such attacks have been doubling every year and this year’s presidential elections could be targeted.

He said it would “naive” to think that France was immune to the type of cyber-campaign that targeted the US election, which has been blamed on Russia.

Mr Le Drian is overseeing an overhaul of France’s cyber-security operations.