Rai declined to be more specific, but said he was confident that it would be "less than a quarter of the current price."
Rai,who has over two decades of experience in different IT areas including cyber security, said his team began coordinating with government agencies and regulators to push for OS upgrades soon after the WannaCry attack began on May 12.
The government's quick action helped minimize the impact of the NotPetya attack, which affected two of India's container port terminals, he said.
The government has also worked with banks to ensure that some 200,000 of the more than 240,000 ATMs in the country, most of which run on older Windows XP systems, have been upgraded with security patches released by Microsoft following the WannaCryattack, Rai said.
This is just an interim solution, however, said Rai, because although the patches fix vulnerabilities in older OS versions, they retain the limitations of those versions.
"New OS versions have different architecture, much improved architecture and much more resiliency," said Rai.