Further, a three-judge bench headed by Justice B S Chauhan was also told that the project not only violates the right to privacy but the "biometrics", which is the foundation of the project, is an unreliable and untested technology and public funds are being channeled to private enterprises without sufficient validation.
"The project is arbitrary and illegal as it allows private dominion over biometrics without governmental control thereby compromising personal security and national security," senior advocate Shyam Divan submitted before the bench, also comprising justices J Chelameswar and M Y Eqbal, which wanted to know the difference between the National Identity Number and Aadhaar.
The Centre, Unique Identification Authority of India (UIDAI) and three oil PSUs -- IOCL, BPCL and HPCL -- had later on moved the apex court seeking modification of its earlier order that Aadhaar card is not mandatory and no person should suffer for want of it in getting the benefits of government schemes.
The petitioners, including Justice K Puttaswamy; former high court judge and Major General S G Vombatkere, who retired as Additional Director General, Discipline & Vigilance in Army HQ; also sought to restrain the Centre, Planning Commission and the UIDAI from issuing Aadhaar cards by way of an executive order of January 28, 2009.