They added that "unnecessary doubts had been created by ex-colleagues" referring to former defence scientist Dr K Santhanam, who continues to question whether the hydrogen bomb failed.
Dr Anil Kakodkar, chairman of the Atomic Energy Commission, refuted Santhanam's claims saying after Pokhran II, India now had the capability to build a deterrent.
It had "given us capability to build deterrent ...India has shown transparency over Pokhran-II results...There should be no doubt over yield of bomb tests," said Dr Kakodkar.
"Rhetoric is not a substitute for good science. No other nuclear state has published more test data," said Dr Chidambaram, adding that there was limit to information that could be revealed.
Dr Santhanam had created a storm a few weeks ago when he claimed that the 1998 tests were not a complete success. Now, a day after the National Security Advisor M. K. Narayanan called his statements incorrect and horrific, Dr Sathanam stuck to his assertions.
Get Breaking news, live coverage, and Latest News from India and around the world on NDTV.com. Catch all the Live TV action on NDTV 24x7 and NDTV India. Like us on Facebook or follow us on Twitter and Instagram for latest news and live news updates.