Advanced New Technologies Co., Ltd.

Alibaba Group Holding Limited

Alipay Information Technology Co., Ltd.

Yuqi Lin

Renhui Yang

Yuan Chen

Changzheng Wei

Jiawei Liu

Xuyang Song

Methods, systems, and apparatus, including computer programs encoded on computer storage media, for blockchain-based decentralized-identifier creation, are provided. One of the methods includes: obtaining a request for creating a decentralized identifier (DID), wherein the request comprises a public key of a cryptographic key pair; creating, based on the public key, a blockchain account associated with a blockchain; creating the DID based on information associated with the blockchain account; and returning a confirmation message comprising the created DID.

System and method for decentralized-identifier creation

Methods, systems, and apparatus, including computer programs encoded on computer storage media, for verifiable-claim issuance. One of the methods includes: receiving, from a first entity, a request for creating a verifiable claim (VC) for a decentralized identifier (DID) associated with a second entity; obtaining, in response to receiving the request, a digital signature associated with the first entity; and generating the VC based on the received request and the obtained digital signature.

System and method for issuing verifiable claims

Methods, systems, and apparatus, including computer programs encoded on computer storage media, for claim verification. One of the methods includes: receiving, from a first entity, a request for verifying a verifiable claim (VC) that comprises a digital signature; obtaining, based on the VC, a public key associated with a second entity; determining that the digital signature is created based on a private key associated with the public key; and verifying the VC based on the determination.

System and method for verifying verifiable claims

Methods, systems, and apparatus, including computer programs encoded on computer storage media, for implementing a resolver service. One of the methods includes: obtaining, from a blockchain, event data for a plurality of blockchain transactions associated with a plurality of decentralized identifiers (DIDs); storing the event data in a database; receiving a request for information associated with the event data, wherein the request comprises one or more account identifiers; identifying one or more DIDs respectively corresponding to the one or more account identifiers based on pre-stored mapping relationships between the one or more DIDs and the one or more account identifiers; and providing, from the database, event data for one or more blockchain transactions associated with the identified one or more DIDs.

System and method for implementing a resolver service for decentralized identifiers

Methods, systems, and apparatus, including computer programs encoded on computer storage media, for decentralized-identifier creation. One of the methods includes: receiving a request from a first entity for obtaining a new decentralized identifier (DID) for a second entity; determining an existing DID associated with the first entity based on the request; generating a cryptographic key pair associated with the second entity comprising a public key and a private key; creating, based on the public key, a DID document associated with the new DID, wherein the DID document comprises the existing DID associated with the first entity; generating a blockchain transaction for adding the DID document to the blockchain; signing the blockchain transaction using the private key of the cryptographic key pair associated with the second entity; and sending, to a blockchain node associated with the blockchain, the signed blockchain transaction for the blockchain node to add to the blockchain.

System and method for creating decentralized identifiers

Methods, systems, and apparatus, including computer programs encoded on computer storage media, for blockchain-based decentralized-identifier authentication, are provided. One of the methods includes: obtaining, from a computing device, a request for creating an authentication challenge for a decentralized identifier (DID); obtaining, from a blockchain network, a DID document corresponding to the DID; retrieving a public key associated with the DID from the received DID document; creating the authentication challenge by encrypting a piece of original text using the public key to create a piece of ciphertext; obtaining information associated with an authentication service endpoint for the DID from the received DID document; sending, to the authentication service endpoint according to the obtained information, the created authentication challenge.

System and method for decentralized-identifier authentication

Methods, systems, and apparatus, including computer programs encoded on computer storage media, for decentralized-identifier creation. One of the methods includes: receiving a request for obtaining a decentralized identifier (DID), wherein the request comprises an account identifier; obtaining, in response to receiving the request, a public key of a cryptographic key pair; obtaining the DID based on the public key; and storing a mapping relationship between the account identifier and the obtained DID.

Methods, systems, and apparatus, including computer programs encoded on computer storage media, for blockchain-based decentralized-identifier authentication, are provided. One of the methods includes: obtaining a request for authenticating a decentralized identifier (DID), wherein the request comprises the DID, a plaintext associated with a challenge for authenticating the DID, and a digital signature on the plaintext; obtaining a public key associated with the DID; determining, based on the obtained public key and the plaintext, that the digital signature on the plaintext is created based on a private key corresponding to the DID; and generating, based on the determination, a message confirming authentication of the DID.

Methods, systems, and apparatus, including computer programs encoded on computer storage media, for mapping decentralized identifiers (DIDs) to real-world entities. One of the methods includes: receiving, by a server system, a request for obtaining a DID, the request comprising an identifier of a subject corresponding to the DID and a proof of identity authentication of the subject; creating, by the server system, a DID document corresponding to the DID, wherein the DID document comprises a mapping relationship between the proof of identity authentication and the DID; generating, by the server system, one or more blockchain transactions for creating the DID and adding the DID document to a blockchain; and sending, by the server system to one or more blockchain nodes associated with the blockchain, the one or more blockchain transactions for adding to the blockchain.

System and method for mapping decentralized identifiers to real-world entities

Methods, systems, and apparatus, including computer programs encoded on computer storage media, for blockchain-based notification are provided. One of the methods includes: obtaining, from a computing device associated with a first decentralized identifier (DID), a query about event data; in response to the obtained query, searching a data store to obtain one or more notifications for event data associated with a second DID, wherein a DID document associated with the second DID comprises the first DID, and wherein the DID document is stored in a blockchain; and providing the one or more notifications for the computing device associated with the first DID.

System and method for blockchain-based notification

Methods, systems, and apparatus, including computer programs encoded on computer storage media, for implementing a resolver service. One of the methods includes: obtaining event data from a blockchain, wherein the event data comprises a plurality of updates associated with a plurality of decentralized identifier (DID) documents stored on the blockchain; storing the event data in a database; receiving a request for information associated with the event data; and providing information about one or more updates associated with one or more of the DID documents in response to the request.

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Hangzhou, China

Yuqi Lin