KR20230069554A - Method of communicationg using multiple secure channel and device implementing thereof - Google Patents

Abstract

The present invention relates to a communication method using multiple encryption channels, and in accordance with an embodiment of the present invention, a user device generates a primary encryption key and a primary public key corresponding thereto using first biometric information of a user. The step of generating and storing and the step of generating and storing, by the user device, a secondary encryption key and a corresponding secondary public key using the user's second biometric information, and the user device is a metaverse server or seller device that is a communication target. Transmitting the identification information of the first block that encrypts the secondary public key and the random number using the primary public key to the metaverse server or seller device and the second block received by the user device from the metaverse server or seller device Decrypting the second block with the secondary encryption key of the user device using the identification information of and confirming the random number, and the user device sets the metaverse server or seller device as a reliable communication counterpart device and identifies data or block identification information It includes the step of transmitting and receiving.

Description

Communication method using multiple encryption channels and device implementing the same

The present invention relates to a communication method using multiple encryption channels and an apparatus implementing the same.

Blockchain can provide reliability of information by connecting blocks that cannot be falsified or tampered with in the contents or distribution process of information. Therefore, interest in technology for generating and verifying information using blockchain is increasing.

In addition, the metaverse is proposed as a paradigm that can perform actions corresponding to various economic, social, and cultural activities in the real world in a virtual space.

However, since both blockchain and metaverse are conducted online, the possibility of hacking arises. Therefore, there is a need for an encryption technology in a convenient method while safely performing encryption between these devices.

The present specification is intended to solve the above problems, and allows reliable information to be exchanged between devices.

In addition, the present specification is intended to improve user convenience by performing encryption by reflecting the user's biometric information.

In addition, the present specification allows devices to perform multiple encryption processes to maintain security from hacking.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention not mentioned above can be understood by the following description.

The method according to an embodiment of the present invention includes the steps of generating and storing, by a user device, a primary encryption key and a primary public key corresponding thereto using first biometric information of a user; Generating and storing a secondary encryption key and a corresponding secondary public key using information, and the user device uses the primary public key of the metaverse server or seller device to communicate with the secondary public key and random number Transmitting the identification information of the encrypted first block to the metaverse server or seller device and the user device using the identification information of the second block received from the metaverse server or seller device to convert the second block to the second block of the user device. Decryption using the primary encryption key to confirm the random number; and the user device setting the metaverse server or seller device as a reliable communication counterpart device and transmitting/receiving data or block identification information.

A user device according to an embodiment of the present invention is a storage unit for storing a primary encryption key, a primary public key corresponding thereto, a secondary encryption key and a secondary public key corresponding thereto, a metaverse server, a seller device, and a block It includes a communication unit that communicates with the chain nodes and a control unit that controls the storage unit and the communication unit.

The user device according to an embodiment of the present invention generates and stores a primary encryption key and a primary public key corresponding thereto using the user's first biometric information, stores it in a storage unit, and uses the user's second biometric information A secondary encryption key and a corresponding secondary public key are generated and stored in a storage unit.

The user device according to an embodiment of the present invention uses the primary public key of the metaverse server or seller device to be communicated with to create a first block that encrypts the secondary public key and random number and adds it to the blockchain. carry out

The user device according to an embodiment of the present invention uses the identification information of the second block received from the metaverse server or the seller device to decrypt the second block with the secondary encryption key of the user device and check the random number to the metaverse server Alternatively, the seller device is set as a reliable communication counterpart device, and data or block identification information is transmitted and received with the metaverse server or seller device.

When the embodiments of the present invention are applied, reliable information can be exchanged between devices.

In addition, when the embodiments of the present invention are applied, user convenience is improved by performing encryption by reflecting the user's biometric information.

In addition, when the embodiments of the present invention are applied, security from hacking can be maintained by performing multiple encryption processes on devices.

The effects of the present invention are not limited to the above-mentioned effects, and various effects of the present invention can be easily derived from the configuration of the present invention.

1 is a diagram showing the interaction of each device according to an embodiment of the present invention.
2 is a diagram showing a process in which each device uses multiple encryption channels according to an embodiment of the present invention.
3 is a diagram showing a process of generating a primary encryption key according to an embodiment of the present invention.
4 is a diagram showing a process of generating a secondary encryption key according to an embodiment of the present invention.
5 is a diagram showing a process of generating a secondary encryption key according to an embodiment of the present invention.
6 and 7 are diagrams illustrating a process of securely exchanging information between devices using encrypted information according to an embodiment of the present invention.
8 is a diagram showing the configuration of an encryption message between devices according to an embodiment of the present invention.
9 is a diagram showing a three-dimensional signal space for generating an encryption key according to an embodiment of the present invention.
10 is a diagram showing an example of dividing a space of a virtual world according to an embodiment of the present invention.
11 is a diagram showing the configuration of a user device according to an embodiment of the present invention.

In order to clearly describe the embodiments of the present invention, reference may be made to the drawings, parts irrelevant to the description are omitted, and the same reference numerals are assigned to the same or similar components throughout the specification.

When an element is described as being “connected,” “coupled to,” or “connected” to another element, that element is or may be directly connected to that other element, but intervenes between each element. It will be understood that may be "interposed", or each component may be "connected", "coupled" or "connected" through other components.

In this specification, the process of adding a block to a blockchain includes a series of processes of adding a generated block to a blockchain. The block adding process creates a block, then adds the block to the blockchain when integrity verification of the block is complete (i.e., if it is normal), and receives the response of the added block's identification information (eg block's address). It includes a series of processes.

In this specification, blocks may be encrypted. The device generating the block may encrypt the contents of the corresponding block with a public key of the device receiving the identification information of the corresponding block. And the device receiving the identification information of the block can decrypt the contents of the corresponding block with its own private key.

In addition, the encryption method may be performed in a previously agreed method other than the above public key-private key method.

This specification looks at a technology that guarantees the safety of item transactions and virtual asset transactions using multiple encryption channels linked to the metaverse based on blockchain.

Hereinafter, each family member of the customer's home or the entire family is provided with an electronic wallet that can store virtual currency received as compensation from advertising companies by playing advertisement videos, voices, and music to customers by purchasing home appliances or through the UX of home appliances. Create one in , and look at the process of identifying each family member and paying the virtual currency that is paid as a reward to the electronic wallet for each family member to each electronic wallet.

The virtual currency acquired in the metaverse world is automatically transferred to the electronic wallet for each family member created in the home appliance, and the virtual currency is transferred from the electronic wallet when purchasing virtual items or NFTs linked to real objects in the metaverse world. Withdraw and make payments to the seller.

1 is a diagram showing the interaction of each device according to an embodiment of the present invention.

The user device (User Device, 100) includes a home appliance used by a user, a communication terminal such as a mobile phone, a computer, and the like. The user's information is encrypted and transmitted to the metaverse server 300, and a predetermined virtual asset can be traded within the metaverse world implemented by the metaverse server 300. also. The user device 100 may acquire the user's biometric information and perform encryption based on it.

The seller device 200 also includes home appliances, communication terminals such as mobile phones, and computers that other users can use. The seller device 200 is a device that trades virtual assets corresponding to virtual assets or real assets in the user device 100 and the metaverse world.

The metaverse server 300 communicates with various user devices 100 and performs predetermined encryption/decryption tasks during communication. The metaverse server 300 may provide a metaverse world/environment to the user devices 100 by implementing the metaverse.

The blockchain node 500 verifies the integrity of the blocks added to the blockchain, adds the block to the blockchain, and transmits identification information (eg, address) of the added block to devices or servers. includes devices. The process of adding a blockchain below can be applied to a process of adding an NFT block or a process of adding a block containing information or messages to a blockchain. In addition, the blockchain node 500 may transmit identification information of the added block to a device requesting block addition or a device to receive the block identification information when block addition is successfully performed.

2 is a diagram showing a process in which each device uses multiple encryption channels according to an embodiment of the present invention. FIG. 2 shows a process in which the user device 100, which is a home appliance/mobile phone device as an embodiment, first performs primary authentication based on biometric information, authenticates the user, and authenticates the server and each other.

The user device 100 extracts the user's first biometric information and stores it as a primary encryption key (S11). For example, the user device 100 may extract and store user's fingerprint information. As an embodiment, the user device 100 extracts feature points of a fingerprint, generates a user's primary encryption key, and stores fingerprint information in a hardware chip of the user device 100 .

Next, the user device 100 extracts the user's second biometric information and stores it as a secondary encryption key (S12). After contacting the user's fingerprint using the primary encryption key, the user device 100 secures the second biometric information by sensing iris data or voice data. Further, the user device 100 generates a user's secondary encryption key based on the iris and voice feature points.

In addition, the user device 100 may generate a secondary public key corresponding to the secondary encryption key.

Then, the user device generates a random number (S13), encrypts the random number and the user's secondary public key with the primary public key of the metaverse server 300, and transmits it to the metaverse server 300. (S14). The metaverse server 300 decrypts the random number and the user's secondary public key by decrypting with the private key of the server (S15). The user's secondary public key is used in the process of exchanging encrypted information with the user device 100 later.

Then, the metaverse server 300 encrypts the random number with the user's secondary public key and transmits it to the user terminal 100 (S16). In addition, the user device 100 stores information (position, speed, etc. of the user character) in the metaverse, encrypts the information with the primary public key of the metaverse server 300, and transmits it to the metaverse server 300 ( S17, S18). Metaverse server 300 decrypts with the private key of the server to check the information (S19). Then, the metaverse server 300 transmits an ACK to the user device 100 (S20).

The embodiment of FIG. 2 can be applied as follows. The user device 100 generates and stores a primary encryption key and a primary public key corresponding thereto using the user's first biometric information. Then, the user device 100 generates and stores a secondary encryption key and a corresponding secondary public key using the user's second biometric information.

In addition, the user device 100 uses the primary public key of the metaverse server 300 or the seller device 200 as a communication target to identify the identification information of the first block that encrypts the secondary public key and random number of the user device. It is transmitted to the metaverse server 300 or the seller device 200. Thereafter, the user device 100 decrypts the second block with the secondary encryption key of the user device 100 using the identification information of the second block received from the metaverse server 300 or the seller device 200 to obtain a random number Check the If the previously sent random number and the received random number are the same, the user device 100 determines that the communication partner is not a hacker.

Then, the user device 100 may set the metaverse server 300 or the seller device 200 as a reliable communication counterpart device and transmit/receive data or block identification information.

Here, the first biometric information may be the user's fingerprint feature point information, and the second biometric information may be any one or more of the user's iris feature point or the user's voice feature point.

Two encryption keys are generated through the process of FIG. 2, and communication is performed safely using them.

Let's look at a detailed embodiment of creating an encryption key. Home appliances will be described as an example of the user device 100 . The sensor of the home appliance transmits the raw data (Raw Data) measured from the sound, voice, motion sensor, CCTV image, etc. of members in each household to the metaverse server (300). The metaverse server 300 provides the function of a cloud analysis server and analyzes raw data obtained by sensors of home appliances according to the characteristics of each data.

Then, the metaverse server 300 identifies the characteristics (gender, age, voice analysis, iris recognition, fingerprint recognition, height, step information, etc.) of each family member, and identifies each family member's appearance, height, body type, Based on gender, a character with a virtual three-dimensional shape is created within the metaverse world. In addition, the metaverse server 300 may create an electronic wallet for each family member.

The electronic wallet encrypts the data recorded in the ledger records such as deposit, withdrawal, account number, and current balance of virtual currency assets by individuals existing on the blockchain with a private key. Various data are stored in blocks on the blockchain, and the user device 100 can read the block and decrypt it with the user's private key, and then check details such as current balance, past deposit and withdrawal details.

In addition, when the virtual currency is insufficient, the user device 100 may purchase the corresponding virtual currency (coin) using a credit card, money in a bank account, or other virtual currency in an electronic wallet.

The user device 100 may measure biometric information used when creating a virtual character in the metaverse world, for example, pupil color, hair color, pupil wrinkles, voice voice, etc., with a camera and a sensor. . Further, the user device 100 generates a private key having a length of M bits or more by combining a unique value of one type of sensor data with a unique value of N or more sensor data of different types.

The method by which the user device 100 generates a private key may be proportional to the maximum block size and header size allowed in the blockchain algorithm.

The user device 100 successively connects the voice print analysis value, the pupil wrinkle analysis value, and the fingerprint analysis value, which are examples of biometric information, in the form of a bit value, and the maximum length of the private key allowed to encrypt the block (bit value). ) can be cut and used.

In addition, the user device 100 registers biometric information (fingerprint) in the user device 100 (eg, home appliance/mobile phone) for the first time, generates a primary encryption key (private key), and then exists inside the user device. It is possible to register the primary encryption key (private key) in the hardware chip to be used. An embodiment of the corresponding hardware security chip may be a chip capable of being written only once. And, after the user device 100 registers the primary encryption key (private key), it is stored inside the hardware.

3 is a diagram showing a process of generating a primary encryption key according to an embodiment of the present invention. The user device generates a list of prime numbers of feature points of first biometric information in a circular form to calculate a primary encryption key of a specific length.

The user device 100 generates a sequence by extracting feature points of the fingerprint (S31). For example, mobile phones or home appliances recognize feature points of a fingerprint and create a list (x sequence) of prime numbers. Then, the user device 100 generates an input sequence as long as a bit length of a specific length by making it in the form of a circular cycle as in S32. S32 is a form in which the prime numbers extracted from the feature points of the fingerprint are made in circular order, and the first number is arranged after the last number.

In S32, the user device 100 randomly assigns prime numbers to feature points of the fingerprint (13, 17, 19, 23, 29, 31), creates a permutation of the prime numbers, and then repeats the prime numbers so that the last 29->13 are connected. makes The user device 100 ensures that a decimal number has a length of at least 1 Byte or more, and has a length of 8 bits or more when converted into bits. The length of the primary private key may be set to 128 bits or 256 bits by reflecting the ciphering structure of the security chip.

Then, the user device 100 generates a public key y (S33). As an example, the user device 100 may find a public key y sequence that satisfies f(x,y)=K, which is an elliptics curve function.

And the user device 100 transmits the public key (y) of the user device to the metaverse server 300 (S34). Similarly, the metaverse server 300 may generate its own public key and private key according to the above-described embodiment and then transmit the public key to the user device 100 such as a mobile phone or home appliance.

As an example of a method for generating a public key by the user device 100, a function (eg, Elliptics Curve Decline) may be used. The user device 100 can easily calculate and find y (public key) using x (private key) from a mathematically defined function F(x,y)=K, but when using y, the private key x You can create y so that it cannot be found.

As described above in FIGS. 2 and 3, the user device 100 generates random numbers to determine whether the other party of communication is a hacker or the metaverse server 300, encrypts them with the public key of the server, and transmits the random numbers. do. The server decrypts the corresponding random numbers by decrypting them with its own private key, and then encrypts them again with the public key of the user device 100 and transmits them to the user device 100.

At this time, the user device 100 decrypts the received data with the private key and checks whether the list of numbers initially generated by the user device 100 and the decrypted data are the same. Similarly, the metaverse server 300 can also confirm that the user device 100 is a legitimate device through the above process.

4 is a diagram showing a process of generating a secondary encryption key according to an embodiment of the present invention. A process in which the user device 100 extracts some bits from the information calculated from the first biometric information and the information calculated from the second biometric information to calculate the secondary encryption key is shown.

The user device 100 senses the user's N pieces of biometric information (for example, a voice print analysis value, a corneal wrinkle analysis value, and a fingerprint analysis value) and generates information having X1/Y1/Z1 bits, respectively (S35).

In the user device 100, the length of the encryption key (a value obtained by concatenating the unique values obtained by acquiring only some of N types of unique values) is sufficiently longer than the length (V) of the data to be encrypted, and the user device 100 has a chip for encryption. If the length (W) that can be processed in is sufficiently long, a private key is generated with the length of W = X1+Y1+Z1 bits.

If W < X1+Y1+Z1, a private key is generated with a length of X1 bits + Y1 bits + Z2 bits. The Z2 bit is part of the Z1 bit.

When the user device 100 uses all X1 bit values of each voiceprint analysis value when generating an encryption key, the characteristics of each person's voice are not duplicated and identified. Similarly, when all Y1 bit values are used for the corneal wrinkle analysis value, the value increases as a unique value capable of identifying each individual's cornea.

Therefore, when all Z1 bits, which are the original length of the fingerprint analysis value, cannot be used, the user device 100 cuts the first bit value of the fingerprint analysis value to the Z2 bit length and appends them to other unique values to generate a private key. It can (S36).

W = X1 + Y1 + Z2

If the length of Z2 bits calculated from the fingerprint analysis value is shorter than a certain standard based on Z1, X2 and Y2 bits excluding some front or rear parts from X1 and Y1 can be used in step S36. In this case, the length of the X2 bits is less than the length of the X1 bits, and the length of the Y2 bits is less than the length of the Y1 bits. The user device 100 may determine the ranges of Z2/Z1, Y2/Y1, and X2/X1 in the process of generating an encryption key.

W denotes a length at which the encryption chip can receive data at once and perform a multiplication operation with an encryption key (private key) (S37).

If the length (V) of the data to be encrypted is longer than the maximum length (W bits) that can be read from the encryption chip at one time, the user device 100 inputs only W length out of the V length to the chip, and the remaining data In the next order, the data is encrypted by multiplying the private key from the W+1 bit position to the 2W bit position to create second encrypted data in the second (encryption chip) cycle (S38, S39).

When the embodiment of FIG. 4 is applied, the secondary encryption private key can be formed long to increase security. The user device 100 may generate a sequence for encryption by alternating and mixing bits extracted from each of the user's biological feature points to increase randomness.

3 and 4 are summarized as follows. As shown in FIG. 3, the user device 100 creates a primary encryption key using a fingerprint by permuting prime numbers at fingerprint feature points and creating a circular permutation, so that the sequence from the front is a circular permutation of 44 prime numbers. It is arranged and repeated to generate encryption bits.

One prime number can consist of more than 1 byte, and 44 prime numbers can have a length of 44*8 bits or at least 352 bits. If the length of the encryption chip is limited to 128 bits or 256 bits, the user device 100 may cut some bits of 352 bits into 128 bits or 256 bits and use them as the primary encryption private key.

5 is a diagram showing a process of generating a secondary encryption key according to an embodiment of the present invention.

As shown in FIG. 4, the secondary private key increases security and randomness, but has a long length (voice voiceprint, iris (66 types or more)) among biometric information to authenticate personal identity information. It is generated by combining two heterogeneous information sequences.

FIG. 5 shows a more complex combination and encryption process in using the X1 bit and the Y1 bit calculated in step S36 in FIG. 4 above.

For example, the user device 100 may generate an encryption key by using a fingerprint as a first layer and an iris (corneal wrinkle recognition) and a voice print as a second layer in an encryption process.

In this way, encryption is performed by 2-layer, and even when the primary private key encryption is exposed, security can be enhanced because data is encrypted in the secondary encryption channel.

In the first layer, the user device 100 may generate a prime number sequence using feature points of the fingerprint. At this time, the feature points of the fingerprint are approximately 33, and in order to further increase the randomness, the user device 100 uses an encryption key (secondary encryption key) with a longer length for an application layer (OS, middleware, application, etc.).

The size of the stream for encrypting data (basic unit of encrypted data block) is longer than the key (primary encryption key) of the first layer, and the number of secondary unique sequences (41 in FIG. 5) such as iris recognition is more than 66. There are many different types, so it is difficult to estimate easily.

Thus, there are more than 66 different permutations of prime numbers that can be generated. In addition, the user device 100 may generate a sequence 45 having high randomness by crossing and combining respective bits of a sequence using voiceprint analysis (42 in FIG. 5) and a sequence using iris recognition.

In addition, when the user device 100 cuts and uses a specific region from a long sequence in which 41 and 42 are combined, a nonce value can be designated randomly. In addition, the user device 100 may designate multiple values of the corresponding nonce, extract bit sequences as long as the lengths specified for each nonce 1 and nonce 2, and connect the entire bit sequence in permutation to obtain a secondary value such as 45. You can generate an encryption key (private key).

As one embodiment, as shown in FIG. 5, since Nonce1=3, the user device 100 copies the bit sequence from the corresponding location to the length L1=3, and Nonce2=7, from the corresponding location to the length L2=2. Copy the bit sequences of At this time, the user device 100 may randomly determine the lengths of L1 and L2.

Then, connect the two copied bit sequences to complete the secondary private key (A), such as 45, and enter it into the Elliptics Curve Formulation (f) to reveal that f(A,B) = K Calculate key B.

And the user device 100 encrypts its own secondary public key (B) and the hash value for the secondary public key with the primary public key of the server and transmits it to the metaverse server 300.

In FIG. 5, the positions of Nonce 1 and Nonce 2 are randomly designated differently from each other, and how many bits each are cut to create a subsequence (ie, the size of L1 and L2) can also be randomly set. . Since the secondary private key is for encrypting and decrypting data with the CPU in the memory of an application/OS/middleware, etc., a data block can be encrypted at once by generating an encryption key as long as possible.

If data is divided into several blocks with a short-length encryption key and encrypted, it becomes easy for hackers to hack by repeatedly testing the characteristics of each block. By multiplying and encrypting, security can be increased by not exposing repetitive characteristics to hackers.

On the other hand, since the metaverse server 300 does not store biometric information such as fingerprint feature points, voice print feature points, and iris recognition, a randomly generated secondary private key (C) of sufficiently long length is generated and f (C ,D) = Generate a secondary server public key (D) that satisfies K.

Then, the secondary server public key (D) and the hash value for the secondary server public key (D) are encrypted with the primary public key of the user device 100 and transmitted to the user device 100.

The user device 100 and the server 300 may perform a process for verifying whether the communication partner is a normal user device or server and not a hacker.

The user device 100 generates random numbers, encrypts the hash value and the value encrypted with the secondary server public key again with the primary server public key, and transmits it to the server. The metaverse server 300 decrypts the data decrypted with the primary private key again with the secondary private key and checks the list of random numbers transmitted by the user device 100.

In addition, the metaverse server 300 compares hash values, and if the hash values match, it encrypts sequences of the same numbers with the secondary public key of the user device 100, meaning that data that has not been forged or altered is normally received. And like 47, the metaverse server 300 appends the hash value of the sequence of numbers.

The metaverse server 300 encrypts <sequence and hash value of numbers encrypted with the secondary public key of the user device 100> with the primary public key of the user device 100 and transmits it to the user device 100 again. .

The user device 100 decrypts the received data with the primary private key and extracts <data encrypted with the secondary public key + hash value>. Then, the user device 100 checks the sequence of numbers obtained by decrypting the data again with the secondary private key.

The user device 100 compares the hash value of these numbers and the attached hash value, and if the same, it confirms that the metaverse server 300 is a normal server, not a hacker.

The server may also repeat the above process to confirm that the user device 100 is not a hacker but a normal user device 100 . And a new two-level security channel is formed through the security channel formed between the user device 100 and the metaverse server 300.

When the user device 100 transmits data to the metaverse server 300 through the above process, the secondary public key of the user device 100 can be safely delivered to the server.

That is, data encrypted with the secondary key in 47 means data encrypted with the secondary public key of the user device 100 . In addition, the user device 100 encrypts "A + B" with the primary public key of the server and transmits the information to the metaverse server 300 safely.

6 and 7 are diagrams illustrating a process of securely exchanging information between devices using encrypted information according to an embodiment of the present invention. In the metaverse world provided by the metaverse server 300, the user device 100 may move its own avatar and visit a store in the metaverse world to purchase an item.

The user device 100 encrypts the user's character information displayed in the metaverse world with the primary public key of the server (S51). For example, the user device 100 encrypts information, such as the position and speed at which the user's character moves on a skateboard, or the store the character has visited in the metaverse world, with the primary public key of the server. The encrypted block is indicated as BLK_1. Here, the user's character information may represent the user's actual movement or state as it is, or may reflect the result of the user's control of his or her character.

Then, a process of adding a block containing encrypted data to the block chain is performed (S52). For example, the user device 100 transmits the block chain addition process of BLK_1 and identification information of the BLK_1 block to the server 300 .

Looking in more detail, the user device 100 creates a block with BLK_1 (the user's encrypted data, location, speed, store, owner's identity information, etc.) and requests verification from the blockchain nodes. And the blockchain nodes verify the 14. block and send a response message confirming that it is normal.

Then, the user device 100 transmits the encrypted information of the user (location, speed, store location, etc.) to the metaverse server 300. The user device 100 transmits identification information (eg, address) of BLK_1 to the metaverse server 300 so that the metaverse server 300 can check the information.

The metaverse server 300 decrypts BLK_1 using the primary private key of the server and checks the contents of the user character (S53). For example, the metaverse server 300 may check the user's current location or the user's motion, and then display it in the metaverse world. Then, the metaverse server 300 transmits the checked information (user's location, character shape, movement information, etc.) to the seller device 200 (S54). As a result of the transmission, the seller device 200 managed by the store employee may check and display information such as the user's location, character shape, and movement.

Meanwhile, the seller device 200 includes its primary public key and random number in the message and encrypts the message with the primary public key of the server (S55). And the seller device 200 transmits this message to the metaverse server 300 (S56). Of course, in this process, the seller device 200 may perform a process of adding a message to the block chain as in S52.

The metaverse server 300 decrypts the random number and the primary public key of the seller device with its primary private key (S57). Then, the metaverse server 300 transmits the primary public key of the seller device encrypted with the primary public key of the user device 100 (S58).

Thereafter, the user device 100 encrypts a block requesting the seller device's secondary public key, which includes the user's secondary public key and purchase-related information from the seller device 200, with the seller device's primary public key, and encrypts the block BLK_2. Generate (S59). In one embodiment, the user device 100 provides BLK_2 including information such as the name of a product desired to be purchased, its own identification information (ID), the location of a character, and a key, and a secondary public key of the user device 100. generate At this time, BLK_2 also includes content requesting the secondary public key of the seller device 200. And the user device 100 encrypts with the primary public key of the seller device 200 to generate a block BLK_2.

See FIG. 7 .

The user device 100 performs a process of adding BLK_2 to the blockchain (S61). For example, the user device 100 may proceed with the process of adding BLK_2 to the blockchain. In this process, the user device 100 requests the blockchain nodes 500 to connect the encrypted block to the chain. The blockchain nodes 500 respond to the user device 100 that there is no problem with the integrity of the block after verifying the integrity. And the user device 100 transmits the identification information of the BLK_2 block to the seller device 200 .

Thereafter, the seller device 200 decrypts the contents of BLK_2 with its primary private key, receives the secondary public key of the user device, checks the contents of the block, and generates BLK_3 for transaction to generate the secondary public key of the user device. Encryption is performed with the public key (S62). For example, the seller device 200 decrypts BLK_2 with its primary private key and receives the secondary public key of the user device 100. Then, the user device 100 checks the content requested for the transaction (information such as price inquiry of the product desired to be purchased).

Then, the seller device 200 generates a secondary private key and a public key, and generates BLK_3 including its own secondary public key and information necessary for the transaction (for example, the number of coins at the price of the product, etc.), and then the user It is encrypted with the secondary public key of the device 100.

And the seller device 200 performs a process of adding BLK_3 to the blockchain (S63). For example, the seller device 200 may proceed with the process of adding BLK_3 to the blockchain. In this process, the seller device 200 makes a request to the blockchain nodes 500 to connect the encrypted block to the chain. The blockchain nodes 500 respond to the seller device 200 that there is no problem with the integrity of the block after verifying the integrity after verification. And the seller device 200 transmits the identification information of the BLK_3 block to the user device 100.

The user device 100 checks the content of BLK_3 in the block chain, encrypts the block with the secondary private key, checks the transmitted content, and generates an encrypted block BLK_4 for purchase confirmation (S64). For example, the user device 100 checks the address of block BLK_3 and reads a block posted to the address of the block.

In addition, the user device 100 decrypts block BLK_3 with the secondary private key of the user device 100, confirms the name of the product requested by the seller device 200, the number of coins to be paid, etc. The block BLK_4, which records the product name, quantity, and coins required for purchase, is encrypted with the primary public key. And the user device 100 proceeds with the block chain addition process of BLK_4 and transmits the identification information of the BLK_4 block to the seller device 200 (S65). It may be performed in the same manner as the process of S61 above.

The seller device 200 decrypts BLK_4 with its own secondary private key, checks the contents of BLK_4, confirms the product and quantity that the user device 100 has requested to purchase, and then receives the coin. Then, BLK_5, which is a response block for notifying that a normal transaction has been made, is generated (S66). Of course, BLK_5 may be encrypted with the secondary public key of the user device 100 described above. Then, the seller device 200 performs a process of adding BLK_5 to the blockchain (S67).

BLK_5 is a block that records the response that the merchant device 200 received coins and requests well, and the seller device 200 encrypts BLK_5 with the secondary public key of the user device 100, and then blocks the blockchain nodes 500. request integrity verification.

At this time, the new owner information of the coin is changed from the user device 100 to the seller device 200, and this information is recorded in the block.

The user device 100 receives identification information (eg, address) of BLK_5 from the seller device 200, reads BLK_5 from the blockchain, and decrypts the block BLK_5 with the secondary private key of the user device 100. Then, the user device 100 confirms that the purchase has been normally made (S68). The user device 100 confirms that the owner of the item to be purchased is changed to the user device 100, the owner of the coin is changed to the seller device 200, and a record is left in the block.

In the embodiment of FIG. 6, the user device 100 receives the identification information of the third block encrypted with the primary public key of the user device 100 from the metaverse server 300 or the seller device 200, and the user device ( 100) The third block is decrypted with the primary encryption key (S55 to S59). As a result, the user device 100 can check the primary public key of the seller device 200 .

The user device 100 sends a fourth block (BLK_2 in FIG. 6) requesting the secondary public key of the user device 100, the purchase information, and the secondary public key of the seller device 200 to the 1 of the seller device 200. It can be encrypted with a secondary public key and transmitted to the identification information of the fourth block to the seller device 200 (S59 to S61).

In addition, in the embodiment of FIG. 7, the user device 100 receives the identification information of the fifth block (BLK_3) from the seller device 200 and decrypts the fifth block with the secondary encryption key of the user device 100. (S62~S64). As a result, the user device 100 checks the secondary public key of the seller device 200 .

Thereafter, the user device 100 encrypts the sixth block (BLK_4) including the coin, which is the transaction price corresponding to the purchase information, with the secondary public key of the seller device 200, and converts the identification information of the sixth block (BLK_4) to the seller. It is transmitted to the device 200 (S64 to 66). Identification information of BLK_5, which is a response block, may be additionally exchanged between the user device 100 and the seller device 200, and the user device 100 may confirm purchase.

6 and 7, the user device 100 and the vendor device 200 perform encryption using the primary and secondary public keys of the other party. As a result, since the encryption channel is made of primary and secondary, information security can be increased.

In addition, the process of transacting using the primary and secondary public keys of the seller device 200 and the user device 100 of FIGS. 6 and 7 is also in the transaction between the user device 100 and the metaverse server 300. can be implemented

In order to purchase an NFT, a virtual item, or a real asset related thereto using a primary encryption channel based on a primary public key and a secondary encryption channel based on a secondary public key, the user device 100 selects a list of products. It is received from the metaverse server 300.

In addition, the user device 100 requests detailed order information (product name, quantity, desired installation date, etc.) necessary for purchasing the product selected from the list to the server 300 through primary and secondary encryption channels.

At this time, the metaverse server 300 checks the inventory quantity, production, delivery, installation schedule, etc., and transmits information such as possible date, time, orderable quantity, purchase price, etc. through the 1st + 2nd encryption channel to the user device (100 ) can be sent to

The user device 100 creates an encryption block containing the payment information (quantity, etc.) of its own coin, adds it to the blockchain after being verified by the nodes, and transfers the address of the block to the metaverse server through the 1st + 2nd channel. Send to (300).

The metaverse server 300 checks the order information and coin, performs the second server public key decryption operation on the corresponding encryption block, and then compares the hash value with the primary server public key decryption operation again, and the normal user device ( 100) confirms that the order has been placed and receives the order details and coins of the user device 100.

And the metaverse server 300 changes the owner recorded in the (public) heading of the NFT, virtual asset, or item that displays real assets in the metaverse world to the user device 100. The metaverse server 300 encrypts the encrypted data part of the specification with the secondary public key of the user device 100, then attaches the data encrypted with the primary public key of the user device 100 again, and records the hash value in the title part. to form blocks. In addition, the metaverse server 300 receives the verification of the blockchain nodes 500 and posts the corresponding block to the blockchain.

The metaverse server 300 notifies the user device 100 of the address of the block, and the user device 100 reads the corresponding block, decrypts it with the secondary private key, checks the hash value, compares whether they are the same, and then returns the primary private key to the user device 100. You can check the contents of the NFT by decrypting it with the key.

In particular, in generating the primary and secondary private keys, it is possible to execute biometric information-based secure multiple activities during the same time in the character's simultaneous performance in the metaverse world.

In other words, when a cyber character performs several actions at the same time in the metaverse world, a biosignal-based encryption channel is automatically formed for each action. In addition, the data transmitted and received through each encryption channel is transmitted and received not only inside the metaverse world but also on other user devices (eg seller devices) outside the metaverse, such as computer and mobile phone networks, and data is transmitted and received on different biometrics for each channel. Each encryption key based on information can be used, and each different data can be transmitted and received by forming each encryption channel.

As an embodiment, in the metaverse world, a character can perform several actions at once, such as purchasing eye cream and eating ice cream while riding a skateboard while conducting a video conference/video call. At this time, each data includes personal information that should not be leaked to the outside. Since video calls can hold family, friends, company meetings, and business partners meetings, personal information should not be leaked, and business conversations should not be leaked to competitors, so it is necessary to conduct video conferences through an encrypted channel. .

At this time, the user device 100 needs to be recorded and stored to have the contents of the video conference legally binding, and the recorded data is converted into an encryption key and voice based on the bit pattern of the character's original corneal signal characteristic point of the owner in the real world. Based on the encryption key generated by combining the bit patterns extracted from the signal feature points, the data is encrypted and recorded in a block and connected to the block chain.

In addition, the information issued by the motion of a character riding a skateboard in the metaverse world includes position, speed, motion of the character (leg bending angle, head angle, limb position, etc.). The user device 100 uses a separate encryption channel different from the encryption channel related to the video conference to transmit the current position, speed, movement, etc. of the user device 100 to the metaverse server 300 based on these information. Create and transmit data.

User device (100 ) and the metaverse server 300, and other vendor devices 200 can be implemented.

In addition, the user device 100 reflects the characteristics of the act of riding a skateboard and generates an encryption key based on the glottal characteristics of the voice to encrypt the connection between the character and the metaverse server 300 and data transmission and reception. In addition, the user device 100 may encrypt a connection between the character and user devices of the user, for example, a mobile phone or home appliance.

In the case where a character controlled by the user device 100 rides a skateboard in the metaverse world, purchases ice cream at a street shop and moves again on the skateboard, through the encryption channel-1 created above for voice communication. Voice data is transmitted and received.

On the other hand, in order to have a conversation with the store owner (seller device), which is a separate character, and to purchase ice cream by paying virtual currency, the character stops moving, moves to the virtual store, and has a conversation with a store employee (seller device). For this purpose, when a new communication channel is created, a new encryption channel may be created.

To this end, it is possible to authenticate that the person currently manipulating the virtual character is an offline actual user by using the iris recognition sensor of the user's offline mobile phone (user device). In addition, in order to form a new session with the store employee (seller device), an encryption key is generated using the voiceprint feature of the voice to encrypt the character's voice data and the store employee's voice data, such as an encrypted voice conversation channel, text chat channel, etc. can form

In addition, all data exchanged between the user device and the seller device is encrypted with the corresponding encryption key to form a block and connected to the block chain to record and store all the contents of transactions and conversations exchanged between the character and the store employee in the future. Enemy acts (EX: fraud, intimidation, etc.) can be used as evidence later and used as legal grounds for punishment both in the metabus internal world and in the real world.

Since the voice in the metaverse world is used by modifying the voice of the user in the real world, another hacker in the virtual world forges the voice and forges the identity of the virtual character so that the user's virtual character commits a crime (ex: In order to prevent fraudulent purchases, blackmail, phishing, etc.), data communication is performed by encrypting each action of a virtual character in the metaverse world with a different encryption key.

As a result, even when talking or trading between virtual characters, data, virtual currency, and virtual assets (ex: clothes, shoes, characters, etc.) can be traded and transferred through encrypted channels.

8 is a diagram showing the configuration of an encryption message between devices according to an embodiment of the present invention.

The encrypted message transmitted from the user device 100 to the metaverse server 300 is encrypted with the server's primary public key (primary server public key). When the metaverse server 300 decrypts the message of FIG. 8 with the primary private key of the server, the random number and the secondary protagonist public key, that is, the secondary public key of the user device 100 can be confirmed. As described above in FIGS. 4 and 5 , the secondary public key of the user device 100 corresponds to the secondary private key extracted from the user's body information (eg, voiceprint information).

In addition, a new encryption channel may be created between the user device 100 and the server 300 according to the action of the character. For example, when the user device 100 performs an action linked with the offline real world within the metaverse world, an encryption channel separate from the previously used encryption channel is created.

In addition, security may be enhanced by forming a longer secondary encryption key according to the importance of the real world interlocking action.

For example, in the case where the user device 100 makes a real estate transaction in the metaverse world, in order to perform a legal act in which the trading activity in the virtual world is linked to the trading activity of land, shopping malls, and buildings in the real world It is assumed that it is necessary to authenticate the identity that the character in the virtual world is offline. At this time, the user primarily confirms that the device is the same person through the user device 100, for example, a home appliance or a mobile phone, using a pattern of a fingerprint previously stored in the home appliance.

At this time, after performing primary identity authentication by forming an OTP by fingerprint or pattern recognition in a specific virtual space (court, etc.), in order to prove that the virtual character is not a hacker disguised, a secondary user in the real world Transmits the secondary public key of the user device 100 generated based on the speech voiceprint characteristics of to the metaverse server 300. At this time, if the primary random number and the public key of the server are encrypted and transmitted, the server decrypts the corresponding data and receives the secondary public key of the user device 100 extracted from the random number and the speech voiceprint characteristic point. Then, the metaverse server 300 encrypts the random number with the secondary public key and transmits it to the user device 100.

The user device 100 decrypts the transmitted information with its own secondary private key, recognizes it as a reliable server if the random number it has sent is the same as the random number just received, and transmits and receives real estate transaction data through an encryption channel. do.

9 is a diagram showing a three-dimensional signal space for generating an encryption key according to an embodiment of the present invention.

The user device 100 arranges the user's first biological information, second biological information, and third biological information on the first axis, second axis, and third axis of the 3D space, respectively, and coordinates of points composed of two or more axes. It shows an embodiment in which is set as a subset of the secondary encryption key.

The coordinates of the black dots where the coordinate points of the three axes overlap mean the above-mentioned coordinates, and the points within the radius of the circle 70 may be a subset of keys constituting one subset. In addition, the user device 100 may generate a secondary encryption key by setting these coordinates as a subset of the secondary encryption key.

10 is a diagram showing an example of dividing a space of a virtual world according to an embodiment of the present invention.

The user device 100 owns a virtual asset in the metaverse world provided by the metaverse server 300, and the user device 100 encrypts the coordinate information of the virtual asset with the above-mentioned secondary public key or primary public key It can be stored in the asset block and later prove ownership of the countable asset.

In carrying out real estate transactions, different shapes of virtual land and buildings in the metaverse world can be mapped in various shapes (not rectangular or angular, but cadastral maps made of various curves by touching with a finger). . In addition, unique types of buildings that do not exist in the real world can be built in the metaverse world.

For example, within the metaverse world, it is possible to build the Eiffel Tower in the middle of Gangnam Station. In addition, the user device 100 may generate a higher level 3D security key in order to recognize its ownership in the virtual world. At this time, in order to generate a 3D security key, the user device 100 establishes a 3D signal space based on biometric information, and a small number assigned to feature points of each biometric information (fingerprint, iris, voice) ( prime numbes are mapped to the X-axis, Y-axis, and Z-axis in the 3D signal space. In FIG. 9, the axis of prime numbers of fingerprint feature points is Y-axis, the axis of prime numbers of speech voiceprint feature points is X-axis, and the axis of prime numbers of iris feature points is set as Z-axis.

Then, the user device 100 forms a group of points located closest to P1 = {{{x ₁₁ , y ₁₁ , z ₁₁ }, {x ₁₂ , y ₁₂ , z ₁₂ }, {x ₂₃ , y ₂₃ , z ₂₃ }}, {{x ₂₁ , y ₂₁ , z ₂₁ }, {x ₂₂ , y ₂₂ , z ₂₂ }, {x ₂₃ , y ₂₃ , z ₂₃ }}, {{x ₃₁ , y ₃₁ , z ₃₁ }, {x ₃₂ , y ₃₂ , z ₃₂ }, {x ₃₃ , y ₃₃ , z ₃₃ }}, { {x ₄₁ , y ₄₁ , z ₄₁ }, {x ₄₂ , y ₄₂ , z ₄₂ }, It is defined as {x ₄₃ , y ₄₃ , z ₄₃ } }} and the user device 100 may form an encryption key group using these points. Further, when the user device 100 records virtual/real asset information, a section of a characteristic area of the asset is divided, and an arbitrary key group is selected from among the above-described encryption key groups for each divided area of the asset. Different keys can be applied.

10 divides cadastral maps to provide differentiated services according to security levels in generating encryption keys. For example, FIG. 10 is composed of a cadastral map having complex boundary lines rather than a simple rectangular shape. And each point to indicate the cadastral map is (a, b), (c, d), (e, f), (g, h), (i, j), (k, l), (m, n ), (o, p), (q, r), (s, u), (v, w), (x, y).

Among them, (a, b) and (c, d) are included in the first group in which the cadastral map is divided. (e, f), (g, h), (i, j), and (k, l) are included in the second group in which the cadastral map is divided. (m, n), (o, p), (q, r), and (s, u) are included in the third group in which the cadastral map is divided. (v, w) and (x, y) are included in the fourth group in which the cadastral map is divided.

In addition, in order to encrypt the data of cadastral map division groups 1, 2, 3, and 4, the number of subgroups of keys (4, rectangle), each key is multiplied by the above divisions 1, 2, 3, and 4 to generate encrypted data streams B ₁ , B ₂ , B ₃ , and B ₄ so that the user device 100 sends the server transmitted over a secure channel.

The metaverse server 300 stores information on biometric authentication keys (keys calculated from pupil, voice, fingerprint, etc.) of the user device 100 through a mutual authentication mechanism with the previous user device 100 . Therefore, the metaverse server 300 can form a signal space of a three-dimensional key as shown in FIG. 9, and information on rules for forming each group by mapping the coordinates of each feature point and each encrypted block It can be confirmed in advance that four have been received.

In addition, the metaverse server 300 may decrypt the four encryption blocks with the four public keys of the user device 100, respectively, and interpret the information of each cadastral map division 1, 2, 3, and 4.

In FIG. 10, we look at the encryption technology of countable assets for the possession of virtual assets in the metaverse world. The coordinates of the 16 points are the coordinates of the main points that can be distinguished from the map of the land in the virtual world. And if you collect 4 dots, you can distinguish the land of the area. There are four sets expressed in the form of {(a,b), (c,d), (e,f), (g,h)} by composing the coordinates of four points.

The length of the secondary encryption public key is sufficiently long, and each of four random points is designated to generate a stream of encryption bits, and the above {(a,b), (c,d), (e,f), (g,h)} multiplied by each stream of bits to produce encrypted bits.

In fact, the coordinates of assets or land in the virtual world are not in the form of straight lines, but can be expressed as 3D coordinates for various types of curved surfaces and 3D space. That is, although FIG. 10 represents only short-length sets of numbers for simplicity, the coordinates of virtual assets having three-dimensional shapes actually used in the metaverse world may be sets of long-length coordinates. That is, in the form of (a,b) = (0x1234567890ABCDEF, 0x9876543210FEDCDBA), one value can have a very long bit.

The coordinates of a three-dimensional shape are composed of three-dimensional coordinates with (a,b,c) = (0x1234567890ABCDEF, 0x9876543210FEDCDBA, 0xFFFFAAAADDDD) and long bits.

The metaverse server 300 extracts three sufficiently long encryption sequences obtained by extracting each element a, b, and c of (a, b, c) from the two-dimensional key, and multiplies them with each element to obtain an encrypted sequence S ₁ , After putting S ₂ , S ₃ , S ₄ , S ₅ , S ₆ , S ₇ , S ₈ , S ₉ , S ₁₀ , S ₁₁ , S ₁₂ into the encryption part of the block, the block composed of "heading part + encryption part" and record the ownership of the virtual asset in the blockchain by connecting the block to the blockchain after receiving integrity verification from the nodes.

When the above-described embodiment is applied, the user device 100 and the server form a primary encryption channel and a secondary encryption channel through a plurality of biometric authentication means even if the user does not directly input a password (private key) in the home appliance. Authentication can be performed between (300) and NFTs, items, etc. can be purchased as virtual assets. In particular, it is possible to make a purchase by generating encryption keys using biometric information and transmitting and receiving primary encrypted personal information and purchase information through a secondary encryption channel. NFTs or items can be transferred by connecting them to the blockchain through the 1st and 2nd encryption process.

In addition, based on electronic wallets specialized for user devices 100 such as home appliances, in order to trade virtual items and pay virtual assets in the metaverse world, a primary encryption channel and a secondary encryption channel are formed between devices to block blocks Based on the chain, it can be exchanged with double-encrypted NFTs, items, and countable assets.

Conventionally, users can directly enter personal information in a mobile phone app or PC, and after receiving identity authentication, each user can create an electronic wallet. However, when the embodiment of the present invention is applied, the metaverse server 300 in-depth analyzes the sensor data measured by home appliances installed in the house to identify each customer through voice analysis and face recognition, and individually Electronic wallets are issued, and virtual currencies can be sent and received as compensation and compensation for NFTs or items exchanged in the metaverse world.

The present invention does not implement an electronic wallet in the form of a plug-in app of a web browser of a mobile phone or PC, or an application installed on a PC. Create an electronic wallet in the user device 100 that encompasses the aforementioned devices or home appliances (refrigerator, washing machine, dryer, etc.) The metaverse server 300 analyzes and generates information identifying each individual to automatically create an electronic wallet. In addition, as a safe private key, it is possible to increase convenience by controlling the remittance and reception of virtual currency using personal voice, fingerprint recognition, pupil recognition, and gait recognition.

In the metaverse world, when the user device 100 purchases, delivers, installs, AS, or transfers virtual assets or "countable assets + physical assets (home appliances, etc.)", the cost to be paid is converted into virtual currency. It enhances security by automatically sending and receiving money, and you can purchase real world products (home appliances, cosmetics, other products, etc.) with virtual currency.

In this specification, NFT (Non-Fungible Token) includes information about virtual assets that can be traded between user devices or seller devices. This information can be transacted on the metaverse, or using a blockchain, or distributed to other devices.

In this specification, the meaning of transmitting and receiving a virtual asset or NFT means that the virtual asset or NFT is included in a blockchain and transmits or receives identification information (eg address) of a block including the virtual asset or NFT. example

In addition, virtual assets can be exchanged in the form of electronic wallets, and virtual assets can be circulated in electronic wallets uniquely assigned to each device.

11 is a diagram showing the configuration of a user device according to an embodiment of the present invention. The user device 100 is composed of a communication unit 110, a control unit 120 and a storage unit 150.

The storage unit 150 stores a primary encryption key, a primary public key corresponding thereto, a secondary encryption key, and a secondary public key corresponding thereto. The communication unit 110 communicates with the metaverse server 300, the seller device 200 and the blockchain nodes 500. The control unit 120 controls the storage unit 150 and the communication unit 110 . The communication unit 110 transmits and receives data or block identification information with other devices. The controller 120 encrypts, decrypts, or generates information or blocks.

Let's take a closer look. The control unit 120 generates a primary encryption key and a corresponding primary public key using the user's first biometric information, stores them in the storage unit 150, and performs secondary encryption using the user's second biometric information. A key and a secondary public key corresponding thereto are generated and stored in the storage unit 150 .

The controller 120 uses the primary public key of the metaverse server 300 or seller device 200 to generate a first block that encrypts the secondary public key and random number and adds it to the blockchain. carry out

The communication unit 110 may receive the identification information of the first block from the blockchain node 500 and transmit it to the metaverse server 300 or the seller device 200.

The control unit 120 uses the identification information of the second block received from the metaverse server 300 or the seller device 200 to decrypt the second block with the secondary encryption key of the user device to check the random number. And the control unit 120 sets the metaverse server 300 or seller device 200 as a reliable communication counterpart device, and the communication unit 110 identifies the metaverse server 300 or seller device 200 and data or blocks. send and receive information

The above encryption process and configuration are applied to the seller's device as well as the user's device.

In addition, in the above process, the first encryption key-first public key and the second encryption key-second public key were generated, but the third encryption key-third public key can be generated with the same mechanism, and the user device, Servers, vendor devices, etc. may increase security by using different encryption keys-public keys in each information sharing process. That is, by maintaining multiple encryption channels, data leakage can be prevented even when a hacking attempt occurs.

The present invention may be embodied in many different forms and is not limited to the embodiments described herein, and various changes and modifications are included in the scope of the present invention without departing from the scope of the present invention. Although each component can be implemented as an independent hardware component, some or all of the components are selectively combined to perform some or all of the combined functions in one or a plurality of hardware program modules. It may be implemented as a computer program or software having Alternatively, a component may be implemented in one device or module, or one component may be implemented by being divided into multiple devices or modules.

100: user device 200: seller device
300: metaverse server 500: blockchain node

Claims (16)

generating and storing, by a user device, a primary encryption key and a primary public key corresponding to the primary encryption key using the user's first biometric information;
generating and storing, by a user device, a second encryption key and a corresponding second public key using the second biometric information of the user;
The user device using the primary public key of the metaverse server or seller device to communicate, transmitting identification information of the first block that encrypts the secondary public key and random number to the metaverse server or the seller device ;
Decrypting the second block with a secondary encryption key of the user device using the identification information of the second block received by the user device from the metaverse server or the seller device to check the random number; and
The user device sets the metaverse server or the seller device as a reliable communication counterpart device and transmits and receives data or block identification information.
According to claim 1,
The user device receives the identification information of the third block encrypted with the primary public key of the user device from the metaverse server or the seller device, decrypts the third block with the primary encryption key of the user device, and decrypts the seller device Checking the primary public key of;
The user device encrypts a fourth block requesting the secondary public key of the user device, purchase information, and the secondary public key of the seller device with the primary public key of the seller device, and generates identification information of the fourth block. Further comprising the step of transmitting to the seller device, a communication method using multiple encryption channels.
According to claim 2,
the user device receiving identification information of a fifth block from the seller device, decrypting the fifth block with a secondary encryption key of the user device, and confirming a secondary public key of the seller device; and
The user device further comprising the step of encrypting a sixth block containing a coin that is the transaction price corresponding to the purchase information with the secondary public key of the seller device and transmitting identification information of the sixth block to the seller device. A communication method using multiple encryption channels.
According to claim 1,
The first biometric information is feature point information of the user's fingerprint,
The second biometric information is at least one of the user's iris feature point and the user's voice feature point.
According to claim 1,
The user device further comprises calculating a primary encryption key of a specific length by generating a list of prime numbers of feature points of the first biometric information in a circular form.
According to claim 1,
The user device further comprises calculating the secondary encryption key by extracting some bits from among the information calculated from the first biological information and the information calculated from the second biological information. .
According to claim 1,
The step of generating and storing the secondary encryption key and the secondary public key corresponding thereto
arranging, by the user device, the first, second, and third biological information of the user on a first axis, a second axis, and a third axis, respectively, in a 3D space; and
The communication method using multiple encryption channels further comprising setting coordinates of points composed of the two or more axes as a subset of the secondary encryption key.
According to claim 1,
The user device owns virtual assets in the metaverse world provided by the metaverse server,
The user device further comprises encrypting the coordinate information of the virtual asset with the secondary public key or the primary public key and storing it in an asset block.
a storage unit for storing a primary encryption key, a primary public key corresponding thereto, a secondary encryption key, and a secondary public key corresponding thereto;
A communication unit that communicates with the metaverse server, merchant device, and blockchain nodes; and
And a control unit for controlling the storage unit and the communication unit,
The control unit generates a primary encryption key and a primary public key corresponding thereto using the user's first biometric information and stores them in the storage unit, and uses the user's second biometric information to generate a secondary encryption key and a primary encryption key corresponding thereto. After generating the corresponding secondary public key and storing it in the storage unit,
The control unit performs a process of generating a first block in which the secondary public key and random number are encrypted using the primary public key of the metaverse server or seller device to be communicated and adding to the blockchain,
The communication unit receives the identification information of the first block from the blockchain node and transmits it to the metaverse server or the seller device,
After the controller checks the random number by decrypting the second block with the secondary encryption key of the user device using the identification information of the second block received from the metaverse server or the seller device,
The control unit sets the metaverse server or the seller device as a reliable communication counterpart device, and the communication unit transmits and receives identification information of data or blocks with the metaverse server or the seller device.
According to claim 9,
After the communication unit receives the identification information of the third block encrypted with the primary public key of the user device from the metaverse server or the seller device,
After the control unit decrypts the third block with the primary encryption key of the user device and confirms the primary public key of the seller device, the secondary public key of the user device, purchase information, and secondary disclosure of the seller device The fourth block requesting a key is encrypted with the primary public key of the seller device,
The communication unit transmits the identification information of the fourth block to the seller device, the user device.
According to claim 10,
When the communication unit receives the identification information of the fifth block from the seller device, the control unit decrypts the fifth block with the secondary encryption key of the user device, confirms the secondary public key of the seller device, Encrypting a sixth block containing coins corresponding to the transaction price with the secondary public key of the seller device;
The communication unit transmits the identification information of the sixth block to the seller device, the user device.
According to claim 9,
The first biometric information is feature point information of the user's fingerprint,
The second biometric information is at least one of the user's iris feature point and the user's voice feature point.
According to claim 9,
The control unit calculates a primary encryption key of a specific length by generating a list of prime numbers of feature points of the first biometric information in a circular form.
According to claim 9,
wherein the control unit calculates the secondary encryption key by extracting some bits from among the information calculated from the first biological information and the information calculated from the second biological information.
According to claim 9,
The control unit arranges the first, second, and third biological information of the user on a first axis, a second axis, and a third axis of a 3D space, respectively, so that a point composed of the two or more axes is obtained. A user device that sets coordinates to a subset of the secondary encryption key.
According to claim 9,
The user device owns virtual assets in the metaverse world provided by the metaverse server,
The control unit encrypts the coordinate information of the virtual asset with the secondary public key or the primary public key and stores it in an asset block.

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