Method for managing information using tree structure based on blockchain, server and terminal using the same

A method for information management using at least one specific tree based on a blockchain, comprising steps of:

• (a) a service-providing server, on condition that at least one specific tree for reference has been generated and information on the specific tree for reference has been registered as a subject ID of at least one subject in the blockchain such that the information on the specific tree for reference corresponds to the subject, wherein the specific tree for reference has leaf nodes to which each of private function values, created by applying its corresponding algorithm to each of one or more private data related to the subject or their processed values, is allocated, if specific private data among the private data is acquired from at least one user device, acquiring or supporting another device to acquire the information on the specific tree for reference stored in the blockchain as corresponding to the subject;
• and
• (b) the service-providing server allocating or supporting another device to allocate at least one specific private function value, created by applying the algorithm to the specific private data or their processed values, to at least one specific leaf node at a location corresponding to the specific private data by referring to the information on the specific tree for reference, to thereby generate at least one specific tree for comparison, and determining or supporting another device to determine whether the specific private data acquired from the user device is forged by comparing a representative value of the specific tree for comparison and a representative value in the information on the specific tree for reference acquired from the blockchain.

A user device for information management using at least one specific tree based on a blockchain, comprising:

• at least one memory that stores instructions;
• and
• at least one processor configured to execute the instructions to perform processes of:
• (I) if one or more private data related to at least one subject are acquired from a specific user of the user device, generating or supporting another device to generate the specific tree, wherein the specific tree has leaf nodes to which each of private function values, created by applying its corresponding algorithm to each of the private data or their processed values, is allocated, and (II) (i) (i-1) registering a representative value of the specific tree as a subject ID of the subject in the blockchain such that the representative value corresponds to the subject and (i-2) registering information on the specific tree as the subject ID of the subject in the blockchain such that the information on the specific tree corresponds to the subject, and (ii) supporting another device to perform one (ii-1) registering the representative value of the specific tree as the subject ID of the subject in the blockchain such that the representative value corresponds to the subject and (ii-2) registering the information on the specific tree as the subject ID of the subject in the blockchain such that the information on the specific tree corresponds to the subject.

A service-providing server for information management using at least one specific tree based on a blockchain, comprising:

• at least one memory that stores instructions;
• and
• at least one processor configured to execute the instructions to perform processes of:
• (I) on condition that at least one specific tree for reference has been generated and information on the specific tree for reference has been registered as a subject ID of at least one subject in the blockchain such that the information on the specific tree for reference corresponds to the subject, wherein the specific tree for reference has leaf nodes to which each of private function values, created by applying its corresponding algorithm to each of one or more private data related to the subject or their processed values, is allocated, if specific private data among the private data is acquired from at least one user device, acquiring or supporting another device to acquire the information on the specific tree for reference stored in the blockchain as corresponding to the subject;
• and (II) allocating or supporting another device to allocate at least one specific private function value, created by applying the algorithm to the specific private data or their processed values, to at least one specific leaf node at a location corresponding to the specific private data by referring to the information on the specific tree for reference, to thereby generate at least one specific tree for comparison, and determining or supporting another device to determine whether the specific private data acquired from the user device is forged by comparing a representative value of the specific tree for comparison and a representative value in the information on the specific tree for reference acquired from the blockchain.