India, Nov. 22 -- As part of the ongoing discussions about India's acquisition of Russian S-400 missile system, the United States has asked India to tighten its "defense technology security processes", a senior state department official said Thursday.

But it was not clear if that was a requirement - the only one or one of several - that would allow India to get a waiver from secondary sanctions under a US law that seeks to punish Russia for the 2016 election meddling, called CAATSA (Countering American Adversaries Through Sanctions Act).

"We have pushed with Indians is: tighten up your procurement processes, tighten up your defense technology security processes and protocols, and then you're putting yourselves in a much more mature spac...