KR102641811B1 - Electronic wallet management method of blockchain network for cryptocurrency transaction security enhancement and system thereof - Google Patents

Abstract

A method for managing an electronic wallet in a blockchain network is disclosed. The electronic wallet management method of the present invention includes the steps of dividing the private key of a member holding an electronic wallet account with a matched private key and public key for each member into a plurality of split keys, and dividing the private key of the member into a plurality of split keys. A step of selecting a plurality of entrusted members for entrusting and distributing the split keys, encrypting and storing the entrusted split keys by the previously registered entrusted member terminal of the selected entrusting member according to a pre-designated encryption algorithm, A step of matching the public key corresponding to the member's electronic wallet with information on a plurality of selected entrusted members and storing it in the public key DB. When a transaction request for cryptocurrency stored in the e-wallet is received from the member, the entrusted member's terminal is sent It includes the steps of receiving and decrypting the entrusted split key, restoring the member's private key by combining the decrypted split key, and processing a transaction request using the restored private key.

Description

Electronic wallet management method and system to strengthen the security of cryptocurrency transactions in the blockchain network { ELECTRONIC WALLET MANAGEMENT METHOD OF BLOCKCHAIN NETWORK FOR CRYPTOCURRENCY TRANSACTION SECURITY ENHANCEMENT AND SYSTEM THEREOF }

The present invention relates to an electronic wallet management method and system for strengthening the security of cryptocurrency transactions in a blockchain network, and more specifically, to an electronic wallet management method and system that can strengthen the security of private keys.

The blockchain platform requires a blockchain electronic wallet to store cryptocurrency linked to blockchain technology or to perform transactions such as remittance and collection. These electronic wallets may hold user information and private keys. When a cryptocurrency transaction occurs, a transaction is created with a private key to prove it, signed, and broadcasted. Transaction participants approve it, the block is shared, and the transaction is completed.

Therefore, most cryptocurrency hacking incidents occur by stealing private keys in cryptocurrency electronic wallet information. Therefore, the security of private keys can be said to be the key to preventing the theft of cryptocurrency.

Therefore, recently, the rate of storing cryptocurrency in offline cold storage instead of hot wallets on exchanges is increasing. However, if the private key is stored in cold storage, the risk of loss is high, and immediate transaction is possible. There is a difficult problem. In particular, it is very difficult to recover the private key of a cryptocurrency wallet when it is lost or stolen.

When existing cryptocurrency exchanges operate hot wallets to process transaction requests, they are also exposed to the risk of hacking and have poor security.

As shown in FIG. 1, a cryptocurrency exchange may operate a web service server 20, an electronic wallet server 100, and a cryptocurrency transaction processing server 200. When an exchange member accesses the web service server 20, logs in with a registered account, and enters transaction request information, the web service server 20 transmits the transaction request to the cryptocurrency transaction processing server 200. The cryptocurrency transaction processing server 200 retrieves the member's electronic wallet address information from the electronic wallet server 100, processes the transaction according to the transaction request using the member's stored private key, and then collects the balance and transaction information. It is provided to members through the web service server 20.

At this time, members can use the online service of a hardware wallet company or perform transactions using the cryptocurrency wallet service provided by the exchange as a connection interface.

If you store your private key in a hardware wallet (10) (①), there is a risk that the hardware wallet itself may be hijacked or your private key may be leaked through a side channel attack. Additionally, if there is a possibility of a wired/wireless connection between the hardware wallet and the service member (②), there is a possibility of theft or alteration of the private key through a man-in-the-middle attack (MITM).

If the private key is stored in the member terminal (300) connected online (③), there is a risk of the private key being leaked due to malicious code infection, etc., and if a transaction is entered by logging into the exchange's web service server (20) (④) ) There is also a risk of man-in-the-middle attack (MITM).

Even if the exchange's electronic wallet server (100) stores each member's private key (⑤), there is a risk that the system and private key may be stolen through an APT attack or the service may be interrupted through a DDoS attack.

Therefore, a method for storing the private key of the electronic wallet more safely without the risk of loss or hacking is required.

The present invention is intended to solve the above-described problem, and the purpose of the present invention is to provide an electronic wallet management method and system with enhanced security of private keys so that the cryptocurrency held by each member in the exchange is stored more safely. there is.

The method of managing an electronic wallet in a blockchain network according to an embodiment of the present invention to achieve the above-described purpose is to use an electronic wallet account with a matched private key and public key for each member. Splitting the member's private key into a plurality of split keys, selecting a plurality of entrusted members among other members to entrust and distribute the split keys, and pre-registered entrusted member terminals of the selected entrusted members. Encrypting and storing the entrusted split key according to a predetermined encryption algorithm, matching the public key corresponding to the member's electronic wallet with information on the selected plurality of entrusted members and storing it in a public key DB. Step, when a transaction request for cryptocurrency stored in the electronic wallet is received from the member, receiving and decrypting the entrusted split key from the entrusted member terminal, combining the decrypted split key to provide the member's private key It includes restoring and processing the transaction request using the restored private key.

At this time, the electronic wallet management method may further include the step of distributing a reward for entrusting the split key to the entrusting member terminal in the form of a token when the transaction request is processed.

Additionally, the selecting step may select a plurality of main entrusted members and auxiliary entrusted members to entrust the same split key for each split key.

In addition, the distributing step is performed on the entrusted member terminal of the entrusted member who is connected online or transmits the split key among the plurality of main entrusted members and auxiliary entrusted members who have been entrusted with the same split key and contributed to processing the transaction request. Only the above rewards can be distributed.

Additionally, the private key may be implemented as a mnemonic corresponding to the member's electronic wallet, and the split key may be at least one word constituting the mnemonic.

In addition, the electronic wallet management method may further include deleting the member's private key when all of the split keys are entrusted to the plurality of entrusted members.

In addition, when the transaction request is received, the electronic wallet management method determines the reception time of the transaction request, the frequency of recent transactions, the amount of cryptocurrency requested for transaction, and the member's information on the transaction platform provided by the cryptocurrency transaction processing server. determining whether transaction request information, including login status and location information of the terminal to which the transaction request was transmitted, matches the member's previously stored transaction pattern information; and, if it does not match the transaction pattern information, the member's It may further include transmitting a confirmation message requesting confirmation of the transaction request to the registered member terminal.

In addition, the selection step includes the amount of cryptocurrency stored in the electronic wallet among the other members, the security of the terminal registered as a consignment member terminal, the status of online connection, the frequency of cryptocurrency transactions, and the amount received from other members. The plurality of entrusted members may be selected based on the evaluation scores.

Meanwhile, in the electronic wallet management system of the blockchain network according to an embodiment of the present invention, an electronic wallet with a matched private key and public key for each member is registered, and the member's private key is registered. An electronic wallet server that divides the split key into a plurality of split keys, a cryptocurrency transaction processing server that selects a plurality of entrusted members among other members to entrust and distribute the split key, and a cryptocurrency transaction processing server entrusted from the cryptocurrency transaction processing server. It includes a trusted member terminal that encrypts and stores the split key according to a predetermined encryption algorithm,

The cryptocurrency transaction processing server matches the public key corresponding to the member's electronic wallet with information on the selected plurality of entrusted members and stores it in the public key DB, and stores the cryptocurrency stored in the electronic wallet from the member. When a transaction request is received, the entrusted split key is received and decrypted from the entrusted member terminal, the member's private key is restored by combining the decrypted split key, and the restored private key is used to restore the member's private key. Transaction requests can be processed.

According to the various embodiments of the present invention as described above, the unique key of the electronic wallet is divided, encrypted, and stored in a distributed manner on the terminals of other members, and as this is called at the time of transaction to process the transaction, the hot wallet within the exchange is damaged by external hacking. You can prevent private keys stored in from being stolen.

As a result, the cryptocurrency stored in the electronic wallet of each member of the exchange can be more safely protected.

In order to more fully understand the drawings cited in the detailed description of the present invention, a brief description of each drawing is provided.
Figure 1 is a diagram illustrating security vulnerabilities in the way existing cryptocurrency exchanges process transaction requests by operating electronic wallets;
Figure 2 is a block diagram briefly showing an electronic wallet management system according to an embodiment of the present invention;
3 is a diagram illustrating a method of entrusting a partition key according to an embodiment of the present invention;
Figure 4 is a flowchart briefly explaining an electronic wallet management method according to an embodiment of the present invention.

First, the terms used in the specification and claims are general terms selected in consideration of their functions in various embodiments of the present invention. However, these terms may vary depending on the intention of technicians working in the field, legal or technical interpretation, and the emergence of new technologies. Additionally, some terms may be terms arbitrarily selected by the applicant. These terms may be interpreted as defined in this specification, and if there is no specific term definition, they may be interpreted based on the overall content of this specification and common technical knowledge in the relevant technical field.

In addition, the same reference numerals or symbols in each drawing attached to this specification indicate parts or components that perform substantially the same function. For convenience of explanation and understanding, different embodiments will be described using the same reference numbers or symbols. That is, even if all components having the same reference number are shown in multiple drawings, the multiple drawings do not represent one embodiment.

Additionally, in this specification and claims, terms including ordinal numbers such as 'first', 'second', etc. may be used to distinguish between components. These ordinal numbers are used to distinguish identical or similar components from each other, and the meaning of the term should not be interpreted limitedly due to the use of these ordinal numbers. For example, components combined with these ordinal numbers should not be interpreted as having a limited order of use or arrangement based on the number. If necessary, each ordinal number may be used interchangeably.

In this specification, singular expressions include plural expressions, unless the context clearly dictates otherwise. In the present application, terms such as 'comprise' or 'constitute' are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are intended to indicate the presence of one or more other It should be understood that this does not exclude in advance the possibility of the presence or addition of features, numbers, steps, operations, components, parts, or combinations thereof.

Additionally, in an embodiment of the present invention, when a part is connected to another part, this includes not only direct connection but also indirect connection through other media. Additionally, the fact that a part includes a certain component does not mean that other components are excluded, but that it may further include other components, unless specifically stated to the contrary.

Additionally, in an embodiment of the present invention, a blockchain network refers to a network with a P2P structure consisting of a plurality of nodes operating according to a blockchain algorithm/protocol. Here, a node refers to a computing node that constitutes a blockchain network and maintains and manages the blockchain based on blockchain algorithms/protocols. A computing node may be implemented as a physical computing device or a logical computing device, such as a virtual machine. If the computing node is implemented as a virtual machine, one physical computing device may include multiple blockchain nodes.

Hereinafter, the present invention will be described in more detail with reference to the attached drawings.

Figure 2 is a block diagram briefly showing an electronic wallet management system according to an embodiment of the present invention.

As shown in FIG. 2, the electronic wallet management system 1000 of the blockchain network according to the present invention includes an electronic wallet server 100, a cryptocurrency transaction processing server 200, and a member terminal 300. Here, the operator of the electronic wallet server 100 and the cryptocurrency transaction processing server 200 may be a cryptocurrency exchange, and as shown in FIG. 1, the cryptocurrency exchange allows members to easily access the exchange to manage and manage cryptocurrency. A web service server 20 that provides a transaction platform to conveniently perform transactions can be separately operated.

The electronic wallet server 100, the cryptocurrency transaction processing server 200, and the member terminal 300 are connected through the network 2000 and can communicate with each other. Network 2000 includes both wired and wireless networks. Wired networks may include cable networks, Internet networks such as the Public Switched Telephone Network (PSTN), and wireless networks may include CDMA, WCDMA, GSM, Evolved Packet Core (EPC), Long Term Evolution (LTE), and Wibro. It may include networks, etc. Of course, the network 2000 according to an embodiment of the present invention is not limited to this, and may include a cloud computing network in a cloud computing environment, a 5G network, etc.

The electronic wallet server 100 is provided with a private key DB 110 and a split key generation unit 120.

The electronic wallet server 100 stores and uses the cryptocurrency paid by the cryptocurrency transaction processing server 200, and the cryptocurrency transaction processing server 200 changes or sets the contents of the contract function set for the cryptocurrency. The contents can be reflected in cryptocurrency.

The electronic wallet server 100 communicates with the cryptocurrency transaction processing server 200 to provide each member with an electronic wallet through which cryptocurrency transactions can be made, and each member's cryptocurrency is operated within the electronic wallet server 100. It can be stored separately in a hot wallet.

The contents of smart contracts can be stored in cryptocurrency. Here, a smart contract refers to a digital contract method in which contract terms are coded based on blockchain technology and the contract contents are implemented when the conditions are met.

The private key DB 110 is configured to store the private key of each member of the exchange holding an electronic wallet. The private key is a unique key required to authenticate the authority of the cryptocurrency in each member's electronic wallet and perform transactions, and can be temporarily stored in the private key DB 110. The private key temporarily stored in the private key DB 110 may be deleted later when the split key is entrusted to the entrusted member terminal 300.

The private key DB 110 and the public key DB 230 of the cryptocurrency transaction processing server 200, which will be described later, include a hard disk drive, solid state drive, flash memory, and CF. It can be implemented as a module capable of inputting and outputting information, such as a card (Compact Flash Card), SD card (Secure Digital Card), SM card (Smart Media Card), MMC card (Multi-Media Card), or Memory Stick (Memory Stick). .

The split key generator 120 is configured to split the private key for each member into a plurality of split keys. For example, as shown in Figure 3, the 64-digit private key for the member's electronic wallet can be divided into four 16-digit split keys. At this time, the first partition key consists of a key of 1 to 16 digits, the second partition key consists of a key of 17 to 32 digits, the third partition key consists of a key of 33 to 48 digits, and the fourth partition key consists of a key of 49 to 64 digits. can be created.

At this time, depending on the embodiment, the private key may be implemented as a mnemonic corresponding to the member's electronic wallet. A mnemonic is a type of private key used to restore the entire electronic wallet, and can usually be composed of 12 words listed. At this time, the split key may be at least one word constituting the mnemonic.

For example, the mnemonics are 'wolf', 'juice', 'proud', 'gown', 'wool', 'unfair', 'wall', 'cliff', 'insect', 'more', 'detail', and If 'hub' consists of a total of 12 words, a partition key corresponding to each word may be generated, or a partition key in which multiple words are grouped together may be generated.

However, this is only an example, and the private key may be generated with a variety of partition keys.

Member terminal 300 is a terminal used by members registered in the exchange and includes smartphones, desktop PCs, tablet PCs, slate PCs, and laptop computers. It can be. Of course, the terminals to which the present invention is applicable are not limited to the types described above, and may naturally include all terminals capable of communicating with external devices.

The member terminal 300 may be installed with a cryptocurrency trading app provided by a cryptocurrency exchange, access the cryptocurrency exchange, display cryptocurrency transaction information, and trade (purchase) cryptocurrency on the electronic wallet server 100. or sell).

Here, the cryptocurrency trading app is an application program that can be downloaded by accessing the app market through the member terminal 300 or downloaded and installed by directly accessing the electronic wallet server 100.

The member terminal 300 may be divided into a general member terminal 310 and a consignment member terminal 320.

The general member terminal 310 is a terminal that stores cryptocurrency in a hot wallet provided by the exchange's electronic wallet server 100 and performs only general transactions for the stored cryptocurrency.

The entrusted member terminal 320, like the general member terminal 310, stores cryptocurrency in a hot wallet provided by the exchange's electronic wallet server 100 and performs general transactions on the stored cryptocurrency, but divides it into other members. This is the terminal that entrusts the key.

Naturally, all member terminals 300 may be configured as entrusted member terminals 320 to which other members' partition keys are entrusted.

The entrusted work of the entrusted member terminal 320 and its specific functions will be described later.

The cryptocurrency transaction processing server 200 may include a consignment member selection unit 210, a public key DB 220, and a transaction request processing unit 230, and may further include a token distribution unit 240, which will be described later, depending on the embodiment. It can be included.

The entrusted member selection unit 210 is used to select a plurality of entrusted members for distributing and storing the split keys divided by the split key generation unit 120 of the electronic wallet server 100 among other members registered in the exchange. It is a composition.

At this time, the entrusted member must be guaranteed high reliability, so the amount or value of cryptocurrency stored in the electronic wallet, the security of the terminal registered as the entrusted member terminal, online access status, cryptocurrency transaction frequency, and other members Can be selected based on the evaluation score received from , and entrusted members can be selected by calculating and adding up the reliability score considering the above-mentioned factors.

For example, a high trust score may be assigned in order of the amount or value of cryptocurrency stored in the electronic wallet. Additionally, based on the security evaluation information regarding external hacking of terminals registered as entrusted member terminals, a high reliability score may be assigned in order of terminals that received a high security evaluation. For example, the security evaluation information may be Common Criteria (CC) authentication information provided by the IT Security Certification Center (ITSCC).

In addition, the longer the online connection time and the fewer offline changes, the higher the frequency of cryptocurrency transactions, and the higher the reliability evaluation score received from other members, the higher the trust score can be assigned.

Additionally, the entrusted member selection unit 210 may select a plurality of entrusted members to entrust the same split key for each split key.

For example, as shown in FIG. 3, 10 different entrusted member terminals 320 may be selected for the same first to fourth partition keys.

At this time, the entrusted member terminal 320 for the same split key may be divided into a main entrusted member and an auxiliary entrusted member according to its characteristics. For example, the main trust member and the secondary trust member may be distinguished according to the obtained reliability score.

When the entrusted member terminal 320 is selected, a split key may be transmitted from the electronic wallet server 100 to the selected entrusted member, and the entrusted member terminal 320, which has received the split key, may use the split key according to a pre-designated encryption algorithm. can be encrypted and stored.

Here, the pre-designated encryption algorithm may be implemented, for example, as an Advanced Encryption Standard (AES) encryption algorithm, which is one of the symmetric algorithms.

At this time, depending on the embodiment, the encryption algorithm for encrypting the split key may be implemented differently for each entrusted member terminal 320.

The public key DB 220 is configured to store the public keys for the electronic wallets of exchange members. The public key DB 220 can store members' public keys by matching them with information on a plurality of entrusted members who are entrusted with private keys corresponding to the public keys.

Meanwhile, if all split keys are entrusted to multiple entrusted members, the private key of the member who entrusted the split key temporarily stored in the private key DB 110 may be deleted.

The transaction request processing unit 230 is configured to process transaction requests received from the member terminal 300. Specifically, in response to receiving a transaction request, the transaction request processing unit 230 identifies the member who transmitted the transaction request, authenticates authority, and performs validation of the requested transaction.

To this end, the transaction request processing unit 230 receives and decrypts the entrusted split key from each entrusted member terminal 320 that has been entrusted with the split key of the member who requested the transaction, and combines the decrypted split key to obtain the member's private key. It can be restored, and transaction requests can be processed using the restored private key.

When receiving a transmission request for a split key, each entrusted member terminal 320 may operate to immediately transmit the split key stored in the entrusted member terminal 320 automatically or through a specific input from the entrusted member.

If there are a plurality of entrusted member terminals 320 for the same split key, a transmission request for the split key can be transmitted sequentially or simultaneously to each entrusted member terminal 320.

Meanwhile, when a transaction request is received, the transaction request processing unit 230 determines whether the member's transaction request information matches the previously stored transaction pattern information, and if it does not match, rejects the transaction request or A confirmation message requesting confirmation of the transaction request may be transmitted to the member terminal 300.

Here, transaction request information includes the reception time of the transaction request, recent transaction frequency, amount or value of the cryptocurrency for which the transaction is requested, the member's login status for the transaction platform provided by the cryptocurrency transaction processing server 200, and the transaction request being sent. It may include location information of the terminal 300.

For example, if the time at which a transaction request was received is far from the time when transactions were generally made, if a transaction has been made for the first time in a long time without any recent transactions, or if the amount or value of the cryptocurrency requested for a transaction is greater than before, the transaction request was sent. In cases where the location information (GPS) received from the terminal 300 deviates from the member's registered residence or living radius, it may not match pre-stored transaction pattern information. In this case, it can be suspected that it is an abnormal transaction.

Additionally, if a transaction request is received while a member is logged out of the transaction platform provided by the cryptocurrency transaction processing server 200, this may also be a case of suspected abnormal transaction.

In this case, the transaction request processing unit 230 immediately rejects the transaction request and requests additional authentication procedures, or requests confirmation of the transaction request from the member's already registered member terminal 300, and if confirmation is not possible, the transaction You may refuse the request.

Trading pattern information can be generated by commonly known pattern recognition algorithms according to statistical or neural networks approaches.

Meanwhile, the cryptocurrency transaction processing server 200 according to an embodiment of the present invention may further include a token distribution unit 240.

When the transaction request is processed, the token distribution unit 240 may distribute a reward for entrusting the split key to the entrusting member terminal 320 in the form of a token.

The token distribution unit 240 may distribute a portion of the revenue from transaction fees generated due to cryptocurrency transactions to the entrusted member terminal 320 in the form of self-issued tokens through cryptocurrency deposits.

At this time, the token distribution unit 240 maintains an online connection among a plurality of main entrusted members and auxiliary entrusted members who have been entrusted with the same split key and automatically transmits the split key or directly transmits the split key according to the split key transmission request. The above-described rewards may be distributed only to the entrusted member terminal 320 that contributed to processing the transaction request.

Figure 4 is a flowchart briefly explaining an electronic wallet management method according to an embodiment of the present invention.

First, the private key of a member holding an account of an electronic wallet whose private key and public key are matched is divided into a plurality of split keys (S410). Here, depending on the embodiment, the private key may be implemented as a mnemonic corresponding to the member's electronic wallet, and the split key may be at least one word constituting the mnemonic.

Afterwards, a plurality of entrusted members are selected among other members to entrust and store the split keys (S420). At this time, for each split key, a plurality of main entrusted members and auxiliary entrusted members can be selected to entrust the same split key.

At this time, it is based on the amount or value of cryptocurrency stored in the electronic wallet among other members, the security of the terminal registered as a consignment member terminal, online access status, cryptocurrency transaction frequency, and evaluation scores received from other members. You can select entrusted members.

Afterwards, the pre-registered member terminal of the selected entrusted member encrypts and stores the entrusted split key according to a pre-designated encryption algorithm (S430). When all split keys are entrusted to multiple entrusted members, the member's private key can be deleted.

Afterwards, the public key corresponding to the member's electronic wallet is matched with information on a plurality of selected entrusted members and stored in the public key DB (S440).

Afterwards, when a transaction request for the cryptocurrency stored in the electronic wallet is received from the member, the entrusted split key is received from the entrusted member terminal and decrypted (S450).

At this time, regarding the received transaction request, the reception time of the transaction request, the recent transaction frequency of the member requesting the transaction, the amount or value of the cryptocurrency requested for transaction, the member's login status on the transaction platform provided by the cryptocurrency transaction processing server, and It can be determined whether transaction request information, including location information of the terminal to which the transaction request was transmitted, matches the member's previously stored transaction pattern information. At this time, if the transaction request information does not match the transaction pattern information, a confirmation message requesting confirmation of the transaction request may be transmitted to the member's already registered member terminal.

Afterwards, the decrypted split keys are combined to restore the member's private key (S460).

Afterwards, the transaction request is processed using the restored private key (S470).

Additionally, after the transaction request is processed, rewards for entrusting the split key can be distributed in the form of tokens to the entrusting member terminal. At this time, depending on the embodiment, among a plurality of main entrusted members and auxiliary entrusted members who have been entrusted with the same split key, rewards may be distributed only to the entrusted member terminal of the entrusted member who contributed to the processing of the transaction request by connecting online or transmitting the split key. You can.

According to various embodiments of the present invention as described above, the unique key of the electronic wallet is divided and encrypted and stored in the terminals of other members, and as this is called and processed during transactions, it is accessed by external hacking into hot wallets within the exchange. You can prevent your stored private keys from being stolen.

As a result, the cryptocurrency stored in the electronic wallet of each member of the exchange can be more safely protected.

Meanwhile, the electronic wallet management method according to the various embodiments described above may be implemented as a program and stored in various recording media. In other words, a computer program that is processed by various processors and can execute the above-described electronic wallet management method may be used while stored in a recording medium.

As an example, i) splitting the private key of a member holding an electronic wallet account with a matched private key and public key for each member into a plurality of split keys, ii) entrusting the split keys among other members to store them in a distributed manner. Step of selecting a plurality of entrusted members for the entrusted member, iii) Step of encrypting and storing the entrusted split key by the selected entrusted member's pre-registered entrusted member terminal according to a pre-designated encryption algorithm, iv) Encrypting and storing the entrusted split key in accordance with the pre-designated encryption algorithm, Step of matching the public key with information on a plurality of selected consignment members and storing it in the public key DB; v) When a transaction request for cryptocurrency stored in the electronic wallet is received from a member, the split key entrusted from the consignment member terminal is received. A program that performs the steps of receiving and decrypting, vi) restoring the member's private key by combining the decrypted split keys, and vi) processing the transaction request using the restored private key is stored in a non-transitory readable program. A medium (non-transitory computer readable medium) may be provided.

A non-transitory readable medium refers to a medium that stores data semi-permanently and can be read by a device, rather than a medium that stores data for a short period of time, such as registers, caches, and memories. Specifically, the various applications or programs described above may be stored and provided on non-transitory readable media such as CD, DVD, hard disk, Blu-ray disk, USB, memory card, ROM, etc.

In the above, preferred embodiments of the present invention have been shown and described, but the present invention is not limited to the specific embodiments described above, and may be used in the technical field to which the invention pertains without departing from the gist of the invention as claimed in the claims. Of course, various modifications can be made by those skilled in the art, and these modifications should not be understood individually from the technical idea or perspective of the present invention.

100: Electronic wallet server 110: Private key DB
120: Split key generation unit 200: Cryptocurrency transaction processing server
210: Entrusted member selection unit 220: Public key DB
230: Transaction request processing unit 240: Token distribution unit
300: Member terminal 310: General member terminal
320: Trusted member terminal 1000: Electronic wallet management system
2000: Network

Claims (10)

In the electronic wallet management method of the blockchain network,
Splitting the private key of a member holding an account of an electronic wallet in which each member's private key and public key are matched into a plurality of split keys;
Selecting a plurality of entrusted members among other members to entrust and store the divided partition keys;
Encrypting and storing the entrusted split key according to a pre-designated encryption algorithm by the pre-registered entrusted member terminal of the selected entrusted member;
Matching the public key corresponding to the member's electronic wallet with information on the selected plurality of entrusted members and storing the public key in a public key DB;
When a transaction request for cryptocurrency stored in the electronic wallet is received from the member, receiving and decrypting the entrusted split key from the entrusted member terminal;
combining the decrypted partition keys to restore the member's private key; and
Processing the transaction request using the restored private key,
The selection step is,
For each split key, a plurality of entrusted members are selected to entrust the split key, and among the other members, the amount of cryptocurrency stored in the electronic wallet, the security of the terminal registered as the entrusted member terminal, and online The trust score is calculated based on the connection status, cryptocurrency transaction frequency, and evaluation scores received from other members to select the plurality of entrusted members.
The selection step is,
Based on the reliability score, a plurality of main entrusted members and auxiliary entrusted members are selected for each split key to entrust the same split key,
When the transaction request is processed, distributing rewards for entrusting the split key to the entrusting member terminal in the form of tokens,
The distributing step is,
The rewards are distributed only to the entrusted member terminals of the entrusted members who contributed to the processing of the transaction request by connecting online or transmitting the split key among the plurality of main entrusted members and auxiliary entrusted members entrusted with the same split key,
When the transaction request is received, the reception time of the transaction request, the frequency of recent transactions, the amount of cryptocurrency requested for transaction, the member's login status for the transaction platform provided by the cryptocurrency transaction processing server, and the date at which the transaction request was sent. Determining whether transaction request information including location information of the terminal matches the member's previously stored transaction pattern information; and
If it does not match the transaction pattern information, transmitting a confirmation message requesting confirmation of the transaction request to the member's pre-registered member terminal; further comprising;
The step of determining whether it matches the member's previously stored transaction pattern information is,
Reception time of the transaction request, recent transaction frequency, amount of cryptocurrency requested for transaction, the member's login status for the transaction platform provided by the cryptocurrency transaction processing server, and location information of the terminal to which the transaction request was sent. If the transaction request information does not match the member's previously stored transaction pattern information, the transaction request will be stopped.
The step of transmitting the confirmation message is,
Requesting additional authentication procedures using the member's already registered member terminal,
How to manage your electronic wallet. delete delete delete According to paragraph 1,
The private key is,
It is implemented as a mnemonic corresponding to the member's electronic wallet,
The split key is
An electronic wallet management method, characterized in that it is at least one word constituting the mnemonic. According to paragraph 1,
An electronic wallet management method further comprising deleting the member's private key when all of the split keys are entrusted to the plurality of entrusted members. delete delete In the electronic wallet management system of the blockchain network,
An electronic wallet with a matching private key and public key for each member is registered, and an electronic wallet server that divides the member's private key into a plurality of split keys;
A cryptocurrency transaction processing server that selects a plurality of entrusted members among other members to entrust and store the divided keys in a distributed manner; and
It includes a consignment member terminal that encrypts and stores the split key entrusted from the cryptocurrency transaction processing server according to a predetermined encryption algorithm,
The cryptocurrency transaction processing server,
When the public key corresponding to the member's electronic wallet is matched with information on the selected plurality of entrusted members and stored in the public key DB, and a transaction request for cryptocurrency stored in the electronic wallet is received from the member , receiving and decrypting the entrusted split key from the entrusted member terminal, restoring the member's private key by combining the decrypted split key, and processing the transaction request using the restored private key,
The cryptocurrency transaction processing server,
For each split key, a plurality of entrusted members are selected to entrust the split key,
The cryptocurrency transaction processing server,
Among the other members, the trust score is based on the amount of cryptocurrency stored in the electronic wallet, the security of the terminal registered as a consignment member terminal, online access status, frequency of cryptocurrency transactions, and evaluation scores received from other members. Calculate and select the plurality of entrusted members,
The cryptocurrency transaction processing server is,
Based on the reliability score, a plurality of main entrusted members and auxiliary entrusted members are selected for each split key to entrust the same split key,
The cryptocurrency transaction processing server is,
When the transaction request is processed, a reward for entrustment of the split key is distributed to the entrusted member terminal in the form of a token, and among a plurality of main entrusted members and auxiliary entrusted members who have been entrusted with the same split key, the By transmitting the split key, the reward is distributed only to the entrusted member terminal of the entrusted member who contributed to processing the transaction request,
The cryptocurrency transaction processing server is,
When the transaction request is received, the transaction request reception time, recent transaction frequency, amount of cryptocurrency requested for transaction, the member's login status for the transaction platform provided by the cryptocurrency transaction processing server, and the transaction request are transmitted. Determine whether the transaction request information, including the location information of the registered terminal, matches the member's previously stored transaction pattern information. If it does not match the transaction pattern information, the transaction request is sent to the member's already registered member terminal. Sends a confirmation message requesting confirmation,
The cryptocurrency transaction processing server is,
Reception time of the transaction request, recent transaction frequency, amount of cryptocurrency requested for transaction, the member's login status for the transaction platform provided by the cryptocurrency transaction processing server, and location information of the terminal to which the transaction request was sent. If the transaction request information does not match the member's previously stored transaction pattern information, the transaction request is stopped and an additional authentication process is requested from the member's previously registered member terminal.
Electronic wallet management system. A computer program stored in a recording medium that executes the electronic wallet management method according to any one of claims 1, 5, and 6.