The Aadhaar issuing body added, in response to an RTI query, that it took note of the breach and got the data removed from those websites.
It did not specify when the breach took place.
It said Aadhaar details have never been made public from or by UIDAI.
"However, it was found that approximately 210 websites of central government, state government departments including educational institutes were displaying the list of beneficiaries along with their name, address, other details and Aadhaar numbers for information of general public," it said.
The UIDAI took note and got the Aadhaar data removed from the said websites, it said in a reply to the RTI application.
UIDAI issues Aadhaar -- a 12-digit unique identification number -- which acts as a proof of identity and address anywhere in the country.
The central government is in the process of making Aadhaar mandatory for people to avail benefits of various social service schemes.
"UIDAI has a well-designed, multi-layer approach robust security system in place and the same is being constantly upgraded to maintain highest level of data security and integrity," the RTI reply said.
The architecture of the Aadhaar ecosystem has been designed to ensure data security and privacy which is an integral part of the system from the initial design to the final stage, it said.
"Various policies and procedures have been defined, these are reviewed and updated continually thereby appropriately controlling and monitoring any movement of people, material and data in and out of UIDAI premises, particularly the data centres," the UIDAI said.
It said security audits are conducted on a regular basis to further strengthen security and privacy of data. Besides this, all possible steps are taken to make the data safer and protected, the authority said.
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
)