The e-Aadhaar password is a combination of eight characters that are used to unlock and open the downloaded PDF file. This password adds an extra layer of security to prevent unauthorized access to your Aadhaar card information. UIDAI is mandated to issue an easily verifiable 12 digit random number as Unique Identity - Aadhaar to all Residents of India. Aadhaar Card password is a combination of the first 4 letters of the name in CAPITAL LETTERS and the year of birth (YYYY) as the password . The password to this e -Aadhaar PDF file/Aadhar card download password is of 8 characters. This 8 character password is a combination of the first four letters of your name written in CAPITAL (name as mentioned in the Aadhaar card) and your Year of Birth (in YYYY format).