Corruption is at peak in railways . Nearly 1000 cases per day . passenger not traveled but tte marked that passenger has traveled . Now how can you justify that you had not traveled .
And it's not that we are using aadhar data . its only when any discrepancy arises then verified from aadhar data . Also biometric of all passenger taken then during it can be stored at terminating/originating station ( all stations are connected with internet now railtel or by google) with respect to date and data will not be huge say hardly 100MB per train and these can be flushed after 3 months i think 10 TB storage will be sufficient for New delhi type station .
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more... And it is not possible to tamper because no one will know which finger print is of whom until verified by UID .