The concept of Aadhaar came with the need for a unique identity for every individual. To implement this, the Indian government created the authority UIDAI to distribute and generate user identities for every individual based on their demographic and biometric data. After the implementation, came the security issues and challenges of Aadhaar and its authentication. So, our study focuses on the journey of Aadhaar from its history to the current condition. The paper also describes the authentication process, and the updates happened over time. We have also provided an analysis of the security attacks witnessed so far as well as the possible countermeasure and its classification. Our main aim is to cover all the security aspects related to Aadhaar to avoid possible security attacks. Also, we have included the current updates and news related to Aadhaar.