Not a security tip per se, but a suggestion to Aadhaar card holders worried about security: UIDAI says that if you don’t want to disclose your Aadhaar number, then you can use VID or Masked Aadhaar, it is valid and accepted widely. To get VID/masked Aadhaar, download Aadhaar from here: https://myaadhaar.uidai.gov.in/genricDownloadAadhaar