The invention discloses a
blind signature and chameleon Hash-based dual-
certificate DID management method and
system, and the method comprises a registration stage, a
verification stage and an updating stage: the registration stage: a user terminal sends a registration message, a blind message and an original identity Hash value as identity Hash, a registration mechanism generates a
blind signature after
verification, issues a registration
certificate, and sends the registration
certificate to a user terminal; the user terminal locally generates a verifiable certificate after blind
verification; in the verification stage, the
server calls the
smart contract, and verifiable certificate validity is verified based on a chameleon
hash function; in the updating stage, the user terminal generates a new verifiable certificate by using the chameleon Hash controllable collision characteristic, and chain identification updating is completed after verification of the intelligent contract. According to the method, authority is split through a double-certificate architecture,
blind signature and chameleon hash technologies are fused,
autonomous control of user identities,
privacy protection and flexible updating are realized, and verification security and efficiency are improved.