The chief executive of UK Anti-Doping, Nicole Sapstead, was sceptical about Miller’s proposal.
“We welcome verified developments in technology which could assist the fight against doping,” she said.
“However, can we ever be sure that this type of thing could never be tampered with or even accurately monitor all substances and methods on the prohibited list?
“There is a balance to be struck between a right to privacy versus demonstrating that you are clean.
“We would actively encourage more research in whether there are technologies in development that can assist anti-doping organisations in their endeavours.”
Speaking at the same conference, Sapstead revealed the extent to which doping and athlete welfare were linked.
Citing one case which included allegations of “domestic abuse”, she said: “It is quite clear to me that if there is abuse, bullying, or just inordinate pressure on an athlete to succeed, that immediately increases the risks of doping and incitement to dope.
“We should be alive to that risk, especially when we are talking about very young or very vulnerable athletes or athletes at the twilight of their career.”
She added: “Sometimes, what appears at first to be an anti-doping case, upon further investigation actually turns out to an issue of athlete welfare.