Digital identification: pros and cons of deanonymization

We live in a digital world, where digital identities are ubiquitous. Nowadays even national governments, like Estonia, India, Japan join the trend of digital identity verification.
For instance, Estonian ID smart-card is issued since 2002 and serves as identification method which is recognized all over the European Union. Another example is Aadhaar, which is a 12 digit unique-identity number issued to all Indian residents based on their biometric and demographic data. However, earlier this