Question: why aadhaar number is hidden?
Answer: The VID is a temporary, revocable 16-digit random number mapped with your Aadhaar details. UIDAI is encouraging the use of VID and has recently added a new feature of a "Masked Aadhaar Card". The masked VID, if provided to the service provider, can be used instead of the Aadhaar number, thereby ensuring safety.