Apparatus and method for deducing social relation between accounts on basis of transaction ledger, and apparatus and method for providing social media service by using same

1. An apparatus for deriving a social relation between accounts based on a transaction ledger, the apparatus comprising:

a data storage unit storing account information, software for deriving an inter-account social relation, and inter-account social relation information; and

a processor deriving the inter-account social relation based on a transaction ledger generated by transactions among users with the accounts and performing construction of a social media service based on the accounts by using the derived inter-account social relation and data processing and transmission/reception for supporting community activities among respective accounts,

wherein the processor provides the derived inter-account social relation to a social media service providing apparatus so as to be linked with a social media account,

wherein the data storage unit further stores value scale information of each account of the accounts, and social media service information including information on the social media account,

wherein the processor inquires the inter-account social relation and the value scale information for the social media account of a user, periodically or in response to a request from the user,

wherein the processor displays the inquired inter-account social relation and value scale information of the account, on the social media service account of the user who is an owner of the social media account, and

wherein the processor differentially applies a fee and a credit limit applied in a financial transaction according to the inter-account social relation or the value scale of the account.

2. The apparatus of claim 1 , wherein the each account includes a blockchain address.

3. The apparatus of claim 1 , wherein the processor derives the inter-account social relation by using transaction information between the accounts.

4. The apparatus of claim 1 , wherein the transaction information includes at least one of transaction information between the each account and another account, and a transaction frequency information between the each account and the another account.

5. The apparatus of claim 1 , wherein the processor calculates a value scale of the each account from the derived social relation, and

the data storage unit further stores the calculated value scale.

6. The apparatus of claim 5 , wherein the processors calculates the value scale of the each account by using at least one of a weighted centrality scale, amount information of the each account, change ratio information, and a level of identity verification information.

7. The apparatus of claim 6 , wherein the data storage unit stores the account information, inter-account social relation deriving and account value scale calculating software, the inter-account social relation information, and the calculated value scale information of the account,

the processor calculates a weighted centrality of each account for calculating the value scale of the each account in the inter-account social relation derived based on the transaction ledger generated by the transactions among the users with the accounts,

the processor calculates a weighted centrality scale of the each account by using a local weight factor determined for a random account and a weight centrality scale factor of a neighborhood account having the social relation with the each account,

the weighted centrality becomes a value acquired by adding a value acquired by reflecting a self ratio to the local weight of a node corresponding the random account and a value acquired by reflecting an external factor ratio without the self ratio to each sum of values acquired by dividing the weighted centrality of each node by a number of adjacent nodes to the corresponding node corresponding to the random account,

a self ratio is a parameter for reflecting, in calculating the weighted centrality of one node, a self factor of the corresponding node, and

the processor calculates the weighted centrality of the each account by an equation of:

WC ( A )= LW ( A )* sr +(1- sr )*( WC ( N 1)/ NH ( N 1)+ . . . + WC ( Nn )/ NH ( Nn ))

(however, WC represents the weighted centrality, WC(A) represents the weighted centrality of node A, LW represents a local weight, LW(A) represents the local weight of node A, sr represents a self ratio, WC(N1) represents the weighted centrality of first neighborhood node N1 of node A, WC(Nn) represents the weighted centrality of n-th neighborhood node Nn of node A, NH represents the number of neighborhood nodes, NH(N1) represents the number of neighborhood nodes of first neighborhood node N1 of node A, and NH(Nn) represents the number of neighborhood nodes of n-th neighborhood node Nn of node A).

8. The apparatus of claim 7 , wherein the processor calculates the weighted centrality scale so that a sum of the weighted centrality scales of respective accounts converges to the sum of local weights of the respective accounts.

9. The apparatus of claim 7 , wherein the local weight factor for the random account is determined as an independent value from the neighborhood account having the social relation with the each account.

10. The apparatus of claim 9 , wherein the processor calculates the local weight of the each account by applying predetermined weights to the weighted centrality scale, a size of amount, the level of identity verification, and the change ratio which are calculated.

11. The apparatus of claim 9 , wherein the processor calculates the local weight of the each account by an equation of:

LW=SA*NH *(100%- CR )* LV,

where:

LW: Local Weight;

SA: Size of Amt;

NH: # of neighborhood addresses;

CR: Change Ratio; and

LV: Level of Identity Verification.

12. The apparatus of claim 5 , wherein the value scale includes a value evaluation scale by evaluation, a score scale, or a grade scale.

13. The apparatus of claim 5 , wherein the processor expresses the value scale by a plurality of badge images or a plurality of character images according to an importance, a utilization pattern, or characteristics of the each account.

14. The apparatus of claim 13 , wherein the characteristics of the each account include at least one of a transaction size, a transaction frequency, a size of amount, and a transaction item.

15. A method for deriving a social relation between accounts based on a transaction ledger, the method comprising:

acquiring transaction information for a random account based on a transaction ledger generated by transactions among users with accounts;

deriving an inter-account social relation based on the acquired transaction information;

performing construction of a social media service based on the account by using the derived inter-account social relation and data processing and transmission/reception for supporting community activities among the respective accounts;

providing the derived inter-account social relation to a social media service providing apparatus so as to be linked with a social media account;

storing value scale information of each account of the accounts, and social media service information including information on the social media account;

inquiring the inter-account social relation and the value scale information for the social media account of a user, periodically or in response to a request from the user;

displaying the inquired inter-account social relation and value scale information of the account, on the social media service account of the user who is an owner of the social media account; and

differentially applying a fee and a credit limit applied in a financial transaction according to the inter-account social relation or the value scale of the account.

16. The method of claim 15 , further comprising:

calculating a value scale of the each account from the derived social relation.

17. The method of claim 16 , wherein the calculating of the value scale includes

calculating a weighted centrality scale, a size of amount, a level of identity verification, and a change ratio based on the acquired transaction information, and

calculating a value scale of the account by applying predetermined weights to the weighted centrality scale, the size of amount, the level of identity verification, and the change ratio which are calculated.

18. An apparatus for providing a social media service using a social relation between accounts based on a transaction ledger, the apparatus comprising:

a data storage unit storing account information, inter-account social relation information, and social media service information; and

a processor enabling transactions among users with the accounts based on the account information, deriving a social relation between respective accounts based on a transaction ledger generated by the transactions, and performing construction of a social media service based on the accounts by using the derived social relation between the respective accounts and the social media service information and data processing and transmission/reception for supporting community activities among the respective accounts,

wherein the processor provides the derived inter-account social relation to a social media service providing apparatus so as to be linked with a social media account,

wherein the data storage unit further stores value scale information of each account of the accounts, and social media service information including information on the social media account,

wherein the processor inquires the inter-account social relation and the value scale information for the social media account of a user, periodically or in response to a request from the user,

wherein the processor displays the inquired inter-account social relation and value scale information of the account, on the social media service account of the user who is an owner of the social media account, and

wherein the processor differentially applies a fee and a credit limit applied in a financial transaction according to the inter-account social relation or the value scale of the account.