Self-Sovereign Dynamic Digital Identities based on Blockchain Technology
Himani Gulati, Chin‐Tser Huang · 2019
With the advancement of electronic and cardless payment technologies and the growth in identity thefts and frauds, it is important for merchants and vendors to be able to perform a retrospective verification on a previous transaction at any later time. However, some of the user's identity credentials used as the basis of trust on these payment technologies may be changing over time, which could largely complicate or confuse the retrospective verifications. In this paper, we propose a self-sovereign dynamic digital identity scheme to address the above problem. We introduce the management and use of dynamic digital identity, which is created using the blockchain technology. The proposed scheme makes use of a combination of biometric traits and other identity attributes that could vary or evolve over time. Since the proposed dynamic identity allows tracing back to a previous version of the identity of the same individual via the blockchain, it can be used to retrospectively verify a previous transaction associated with a previous version of the identity.