One affected user, unable to login into his PS4 console, said: "Even when I try to log in into the site of PlayStation goes 404 error."
"We have not shared any information of users in India with any foreign governments, nor have we used such data in any manner that would compromise the integrity of India."
Sebi said the selected bidder would be responsible for carrying out an assessment of threat and vulnerabilities in the regulator's information technology infrastructure.
"The impact of these threats is very real. It's important to recognise that the numbers, highlighting increases or decreases of certain types of attacks, only tell a fraction of the story."
Cuba has signed the deal with Google which will allow the internet giant to provide faster access to its data on the island.