Identity management has evolved from paper file folders to siloed or somewhat connected IAM systems product or service vendors centrally run. One thing hasn't changed much is each vendor still has to request same or similar information their users have input again and again whenever they need to access a new offering and then authenticate if the information provided is true and valid.
If users are repeating themselves and vendors repeating what others have already done, isn't that a huge waste of resources?
Self-sovereign identity (SSI) is the much needed paradigm shift that allows individuals or organizations to have ownership of their digital and analog identities, and control over how their personal data is shared and used.
With SSI, users would come with information validated and stored in verifiable credentials issued by trusted parties and readily to be taken by vendors with instant authentication. Decentralization makes verifiable credentials possible.