Abstract: Method for settling an asset transaction in which a first asset is exchanged for a second asset, which first asset is registered as an association with a specific first blockchain asset (A) on a blockchain-based ledger (L), which second asset is either a second blockchain asset (A) on the ledger (L) in question or an asset registered as an association with a specific second blockchain asset (A) on the said ledger (L).

Abstract: Method for settling a transaction concerning an asset and being registered by forming part of a blockchain-based ledger (L) for said asset, which ledger (L) is arranged to keep track of transactions concerning the asset in question from senders to specified asset addresses (A), which transactions are signed using a private cryptographic key belonging to the sender in question.

Abstract: Method for creating a digitally stored user identity using a blockchain-based asset ledger (L), which ledger (L) is arranged to keep track of transactions concerning the asset in question from senders to specified asset addresses (A), which transactions are signed using a private cryptographic key belonging to the sender in question and are registered by forming part of said ledger (L) for later verifying of such transactions.