BENGALURU: Security will be a big concern for Aadhaar,

, former chairman of

issuer UIDAI, said. But he indicated that

(

) was on top of it.

"There hasn't been a hack to Aadhaar systems. People have tried to get access to OTPs (one-time passwords) and game others' details and capture them. It's not really a hack, but absolutely, security is going to be a big concern," Nilekani said at an event organized by the

(

) on Tuesday.

He was responding to a question related to the recent instance where technology professional Abhinav Srivastava allegedly illegally created a public app that could obtain details of Aadhaar holders. "If we are in a digital world, we have to make sure that all our systems are secure. It's an ongoing process. All over the world, it's a challenge, but we are moving at a rapid pace," he said, suggesting UIDAI was using the best security systems and protocols.

Srivastava had built his app by hacking into an e- hospital server hosted by the government's

, which has a licence from UIDAI to access KYC (know your customer) details of Aadhaar holders.