Blockchain-based digital identity management method

A digital identify management device comprising:

• a processor;
• a memory which stores instructions to be executed on the processor;
• and
• a storage which stores a digital identity data structure,
• wherein the instructions comprise:
• an operation of performing a first process for storing identity identification information of a subscription request in a first block of a blockchain in response to the subscription request from a service request device and obtaining a block hash value of the first block as a result of performing the first process;
• an operation of performing a second process for storing the block hash value of the first block and data of authentication information of the subscription request in a second block of the blockchain and obtaining a block hash value of the second block as a result of performing the second process;
• and
• an operation of inserting the block hash value of the second block into a digital identity data structure as a result of processing the subscription request.

A non-transitory recording medium storing a computer program implemented as computer-readable code, wherein the computer program comprises instructions, the instructions comprising:

• an operation of performing a first process for storing identity identification information of a subscription request in a first block of a blockchain and then obtaining a block hash value of the first block as a result of performing the first process;
• an operation of performing a second process for storing the block hash value of the first block and data of authentication information of the subscription request in a second block of the blockchain and then obtaining a block hash value of the second block as a result of performing the second process;
• and
• an operation of inserting the block hash value of the second block into a digital identity data structure as a result of processing the subscription request.