System and method for trading privacy information

1 . A system for trading privacy information, comprising:

an information provider terminal;

an information purchaser terminal; and

an intermediary server comprising:

a transceiver that performs data communication with the information provider terminal and the information purchaser terminal via a network;

a privacy information collection unit that receives and collects privacy information from the information provider terminal;

a purchase information collection unit that receives and collects promotion information from the information purchaser terminal and corresponding reward information predetermined according to one or more privacy information usage scopes of the privacy information;

a list generation unit that generates, for the information purchaser, a purchase information list by listing reward information determined according to content of the promotion information and the one or more privacy information usage scopes of the privacy information;

a scope setting unit that sets a scope of providing the privacy information to an information purchaser selected by the information provider through the purchase information list, wherein the information provider directly selects and limits a scope of privacy information to be sold based on reward amounts displayed according to types and number of the privacy information such that the privacy information is used only by a legitimate information purchaser selected by the information provider within a consented scope;

reward amount calculation unit that calculates a reward amount to be paid from the selected information purchaser to the information provider based on the selected scope of privacy information for the selected information purchaser;

an authentication unit that authenticates the information provider and the information purchaser via an authorized digital certificate and verifies that the reward amount from the selected information purchaser is delivered to the information provider; and

a storage unit that distributes and stores the privacy information in one or more blocks of a blockchain ledger for secure storage and management of the privacy information,

wherein:

the storage unit that, upon receipt of the privacy information by the privacy information collection unit from the information provider terminal, immediately distributes and stores the privacy information in one or more blocks of the blockchain ledger, such that the intermediary server does not store anything related to the privacy information of the information provider outside of the blockchain ledger, the privacy information is maintained exclusively within the one or more blocks of the blockchain ledger, and the intermediary server retains no copy of the privacy information and functions solely as a routing and orchestration layer with respect to any subsequent transmission of the privacy information from the blockchain ledger;

the purchase information list displays reward information set according to a privacy information usage scope defined by the information purchaser and includes selection windows configured to allow the information provider to select one or more of the displayed reward information;

higher reward amounts are paid to the information provider as more of said selection windows corresponding to the privacy information are selected by the information provider;

different reward amounts are set according to different types of the privacy information corresponding to the respective selection windows;

the purchase information list, including promotion information comprising advertisements, events, loans, and commodity advertisements collected by the purchase information collection unit, is provided to the information provider terminal via the transceiver;

each said reward amount is transferred directly from the corresponding information purchaser to the information provider without involvement of the intermediary server;

upon verification by the authentication unit that the reward amount has been delivered from the information purchaser to the information provider, the transceiver automatically transmits the privacy information within the selected scope from the blockchain ledger to the information purchaser terminal; and

subsequent to said transmitting of the privacy information within the selected scope, the intermediary server is further configured to, upon a request from the information provider, provide the purchase information list again to the information provider terminal to enable the information provider to modify the consented scope of privacy information for the selected information purchaser by adding or removing privacy information via the selection windows, cause the reward amount calculation unit to recalculate an updated reward amount based on the modified scope, and transmit any added privacy information corresponding to the modified scope from the blockchain ledger to the information purchaser terminal only after the authentication unit confirms that an additional reward amount corresponding to the modified scope has been delivered from the information purchaser to the information provider.

2 . A method for trading privacy information, comprising:

A first step of receiving and collecting, by an intermediary server via a transceiver, privacy information from an information provider terminal, and distributing and storing the privacy information in one or more blocks of a blockchain ledger for secure storage;

a second step of receiving and collecting, by the intermediary server via the transceiver, promotion information from an information purchaser terminal and corresponding reward information that is predetermined according to a scope of the privacy information;

a third step of authenticating, by an authentication unit of the intermediary server, the collected privacy information and the collected promotion information and reward information, including verifying an information provider and an information purchaser via a digital certificate-based service to ensure both the information provider and the information purchaser are authorized parties;

a fourth step of generating, by a list generation unit, a purchase information list listing reward information determined according to content of the promotion information and the scope

of the privacy information for the information purchaser;

a fifth step of providing, by the transceiver, the purchase information list to the information

provider terminal and setting, by a scope setting unit, a scope of privacy information to be provided to an information purchaser selected by the information provider through the purchase information list, wherein the information provider directly selects and limits the scope of privacy information to be sold based on reward amounts displayed according to the types and number of privacy information, such that the privacy information is used only by a legitimate information purchaser selected by the information provider within a consented scope;

a six step of calculating, by a reward amount calculation unit, a reward amount to be paid

from the selected information purchaser to the information provider based on the selected scope

of privacy information;

a seven step of transmitting, by the transceiver, information indicative of the calculated reward amount to the information purchaser terminal to prompt a direct transfer of the reward amount from the information purchaser to the information provider;

an eighth step of confirming, by the authentication unit, that the reward amount has been

delivered from the information purchaser to the information provider;

a nineth step of responsive to said confirming, transmitting, by the transceiver, the privacy

information within the selected scope from the blockchain ledger to the information purchaser terminal;

a tenth step of providing, by the intermediary server via the transceiver and in response to a subsequent request from the information provider after the nineth step, the purchase information list again to the information provider terminal to allow the information provider to modify the consented scope of privacy information for the selected information purchaser by selecting or deselecting one or more of the selection windows on the purchase information list;

an eleventh step of recalculating, by the reward amount calculation unit, an updated reward amount based on the modified scope of the privacy information selected by the information provider; and

a twelfth step of transmitting, by the transceiver, any additional privacy information within the modified scope from the blockchain ledger to the information purchaser terminal, after confirming, by the authentication unit, that an additional reward amount corresponding to the modified scope has been delivered from the information purchaser to the information provider,

wherein:

upon receipt of the privacy information from the information provider terminal, the privacy information is immediately distributed and stored in one or more blocks of the blockchain ledger for safe storage and management, such that the intermediary server does not store anything related to the privacy information of the information provider outside the blockchain ledger, the privacy information is maintained exclusively within the one or more blocks of the blockchain ledger, and the intermediary server retains no copy of the privacy information and functions solely as a routing and orchestration layer with respect to any subsequent transmission of the privacy information from the blockchain ledger;

the purchase information list displays reward information set according to a privacy information usage scope defined by the information purchaser and includes selection windows allowing the information provider to select one or more of the displayed reward information;

higher reward amounts are paid to the information provider as more selection windows corresponding to the privacy information are selected by the information provider;

different reward amounts are set according to different types of the privacy information corresponding to the selection windows;

the purchase information list includes promotion information comprising advertisements, events, loans, and commodity advertisements collected by the purchase information collection unit and is provided to the information provider terminal via the transceiver; and

each said reward amount is transferred directly from the information purchaser to the information provider without involvement of an intermediary, such that no intermediate entity processes or holds the reward transfer.