The government has made "substantial material errors and misrepresentation of fact" in its response to a London School of Economics report on ID cards, the college has said.
But the LSE also welcomed the Home Office's willingness to engage with critics and respond to the LSE's report, which claims that plans for ID cards could cost as much as £19bn to implement – around twice the government's estimates.
At the same time, the LSE said the Home Office's response contained "substantial material errors and misrepresentation of fact.
"It also sets out rebuttals that cite material which is not relevant to the points in question. On a number of critical issues, HO's response rebuts aspects of the LSE report without providing alternative data."
The LSE said the Home Office had also chosen to disregard the vast majority of its report. "Comprehensive sections on identity fraud, policing, crime, national security, counter-terrorism, discrimination, international obligations and the UK IT environment have been ignored," the LSE said.
The Home Office is preparing a response to the LSE's latest comments.