In a statement issued here, the Unique Identification Authority of India (UIDAI) reiterated that there "has not been any Aadhaar data breach".
"The Aadhaar data including biometric information is fully safe and secure," UIDAI claimed.
The statement comes amid news reports that anonymous sellers were offering unrestricted access to Aadhaar details for Rs 500 over WhatsApp.
The Aadhaar-issuing body said it has given the "search facility" for grievance redressal to designated personnel and state government officials to help residents, that too only upon entering their Aadhaar number.
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UIDAI said since it maintains full log and traceability of the facility, legal action including FIR against the persons involved in the case, is being initiated.
UIDAI said even its grievance redressal search facility offers only limited access to name and other details and "has no access to biometric details".
"...there has not been any data breach of biometric database which remains fully safe and secure with highest encryption at UIDAI and mere display of demographic information cannot be misused without biometrics," it said.
"Also, mere availability of Aadhaar number will not be a security threat or will not lead to financial/other fraud, as for a successful authentication, fingerprint or iris scan of individual is also required," UIDAI said adding that "claims of bypassing or duping the Aadhaar enrolment system are totally unfounded".