Digital Identity: Why use blockchain?
A distributed ledger (commonly called “blockchain”) enables everyone in the network to have the same source of truth about which credentials are valid and who attested to the validity of the data inside the credential, without revealing the actual data.
Tykn’s digital identity platform uses Sovrin. A global registry for public keys to verify offchain data with those keys.
Through the infrastructure of Sovrin, the verifying parties do not need to check the validity of the actual data in the provided proof but can rather use the Sovrin blockchain to check the validity of the attestation and attesting party (such as the government) from which they can determine whether to validate the proof.
For example, when an identity owner presents a proof of their date-of-birth, rather than actually checking the truth of the date of birth itself, the verifying party will validate the government’s signature who issued and attested to this credential to then decide whether he trusts the government’s assessment about the accuracy of the data.
Hence, the validation of a proof is based on the verifier’s judgement of the reliability of the attestor.
Leveraging the Sovrin blockchain establishes trust between the parties and guarantees the authenticity of the data and attestations, without actually storing any personal data on the blockchain.
This is crucial as a distributed ledger is immutable, meaning anything that is put on the ledger can never be altered nor deleted, and thus no personal data should ever be put on the ledger.
Sovrin is a global platform, with 60+ trusted Stewards (like IBM, CISCO and Tykn) operating the network, covering every continent (except antarctica).
Learn more about Tykn‘s digital identity platform here.