Aadhaar masking is used to protect the privacy of personal information contained in the Aadhaar, which is a unique 12-digit identification number issued by the government of India to every resident of the country. The solution involves masking or obscuring, sensitive information contained in the Aadhaar number, such as the individual's name, address, and photograph. This can be done by replacing certain digits or characters with asterisks or other symbols, or by encrypting the information. The goal of Aadhaar masking is to ensure that personal information is protected while still allowing organizations to verify the identity of individuals using the Aadhaar number.