Since the case closed, one scientist responsible for drawing up Wada's threshold test has already publicly admitted the test is flawed.
"How long have they known this for? I'd love to know," Froome said. "If it's data they have had from the very beginning, then it does make a mockery of the proceedings and it would be scandalous."
Asked whether he would contemplate bringing charges against Wada or the UCI if that was the case, Froome said: "It's not something I've ever really given thought to, especially on the eve of the Tour. I'm more concentrating on getting through the next few weeks.
"But to be honest, right from the word go, I knew I hadn't done anything wrong. I mean, the [salbutamol] limit is 16 puffs and I went nowhere near the limit. I mean, if I took 15 puffs, maybe I would have been scratching my head saying, 'Did I count right?' But I was nearer to half that number. So I knew there was no way I could have been near 16. That from the very beginning has kept me going."
Froome was generally in upbeat mood as he prepared to get his race under way, despite an unsettling reception at Thursday's team presentation in La Roche-sur-Yon.
Froome, though, denied the hostile reception had got to him. Nor was he worried about his safety over the next three weeks.
"I have to block all that out," he said. "I'm used to it. It wouldn't be the Tour de France without a bit of edginess here or there. Hopefully the racing will be so full on, there won't be time to even think about anything outside of the race."