In the digital age, online identity has become a critical part of our daily lives and has been managed through centralized and federated identity models. However, both models have drawbacks, such as a lack of user control and privacy concerns. The presence of intermediaries, such as certification authority and identity providers, is a fundamental requirements in both models. Nevertheless, they represent possible targets of cyber attacks, resulting in as data breaches and identity theft. The Self-Sovereign Identity is a new paradigm in digital identity that seeks to address these issues by putting users in control of their identity and personal data, avoiding the involvement of centralized authorities or third-party intermediaries.