  The emergence of distributed ledger technology (DLT) based upon a blockchain
data structure, has given rise to new approaches to identity management that
aim to upend dominant approaches to providing and consuming digital identities.
These new approaches to identity management (IdM) propose to enhance
decentralisation, transparency and user control in transactions that involve
identity information; but, given the historical challenge to design IdM, can
these new DLT-based schemes deliver on their lofty goals? We introduce the
emerging landscape of DLT-based IdM, and evaluate three representative
proposals: uPort; ShoCard; and Sovrin; using the analytic lens of a seminal
framework that characterises the nature of successful IdM schemes.
