CN110942316A - Transfer verification method and system based on multi-party verification - Google Patents
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Abstract
The invention discloses a method for transferring and paying under the condition of not using a private key aiming at a block chain, which belongs to the field of the block chain and specifically comprises the following steps: a public and transparent transfer mode is provided, after a user sends a transfer request, the user can transfer assets in the account according to prestored information, and meanwhile, the whole transfer process is guaranteed to be supervised. The invention can solve the technical problems that the private key of the user is easy to attack and the safety of the digital assets of the user is difficult to ensure because the private key of the user needs to be backed up on a third-party platform in the existing block chain transaction system, and the technical problem that the user is inconvenient to use because the user needs to remember the long and complicated private key.
Description
Technical Field
The invention belongs to the field of block chains, and particularly relates to a transfer verification method and system based on multi-party verification.
Background
In the existing block chain transaction system, a user needs to input a private key for verification every time when initiating a transfer, and the private key is usually complex and long, so that the memory cost of the user is high, and the use is inconvenient.
In view of this, some users choose to back up their own private keys on the third-party platform, so as to avoid inputting lengthy and complicated private keys in each transaction, however, the third-party platform often has a centralized feature, so that the backed-up private keys of the users are easily attacked, and thus, the security of the digital assets of the users is difficult to ensure.
Disclosure of Invention
Aiming at the defects or the improvement requirements of the prior art, the invention provides a transfer verification method and a transfer verification system based on multi-party verification, and aims to solve the technical problems that a private key of a user is easy to attack and the safety of the digital assets of the user is difficult to ensure because the private key needs to be backed up on a third party platform in the prior block chain transaction system, and the use is inconvenient because the user needs to memorize the lengthy and complicated private key.
To achieve the above object, according to one aspect of the present invention, there is provided a blockchain transfer authentication method based on multi-party authentication, including the steps of:
(1) the method comprises the steps that a client sends a first transaction request when registering to a blockchain network, wherein the first transaction request comprises a third-party channel of a user operating the client, information of friends of the user in the blockchain network, the minimum verification code matching number N and the designated verification code number N;
(2) the client sends a second transaction request to the blockchain network, wherein the second transaction request comprises a target transaction party, a transaction amount and an address of a first transaction request submitted by the client when the client registers in the blockchain network;
(3) a node in the block chain network generates a verification code according to a second transaction request from a client, sets a verification code number for the verification code, constructs a third transaction request according to the verification code and the verification code number, and sends the third transaction request to the block chain network;
(4) the nodes in the block chain network construct a plurality of third transaction requests according to the received third transaction requests until the total number of the third transaction requests is equal to the number of the specified verification codes, and all the third transaction requests are sent to the block chain network;
(5) the client side continuously obtains the verification codes from the third-party channel and the friends of the user, judges whether the number of the obtained verification codes is larger than or equal to the minimum verification code matching number, if so, the step (6) is carried out, and otherwise, the step (5) is continuously repeated;
(6) the client packs all verification codes acquired from a third-party channel and friends of the user and addresses of all third transaction requests into a fourth transaction request, and sends the fourth transaction request to the blockchain network;
(7) and analyzing the fourth transaction request by a node in the block chain network to obtain all the addresses and all the verification codes of the third transaction request, obtaining the hash value of each verification code according to all the addresses of the third transaction request, verifying the corresponding verification code according to the hash value of each verification code, judging whether the total number of the verification codes passing the verification is greater than or equal to the minimum verification code matching number, if so, allowing the user to execute the transfer operation of the corresponding transaction amount to the target transaction party, and ending the process, otherwise, refusing the user to execute the transfer operation, and ending the process.
Preferably, the lowest verification code matching number N and the specified verification code number N need to satisfy the following relationship: n is more than or equal to N.
Preferably, step (3) comprises the sub-steps of:
(3-1) randomly generating a verification code by a node in the blockchain network, analyzing the address of the first transaction request from the second transaction request, judging whether to select the information of the friends of the user in the blockchain network or select a third-party channel of the user according to the address, if the former is selected, entering the step (3-2), and if the latter is selected, entering the step (3-3);
(3-2) the node in the blockchain network encrypts the verification code by using the public key of the friend in the information in the blockchain network, sends the encryption result to the friend, packages the address of the second transaction request, the encryption result and the verification code number (the value of which is 1) into a third transaction request, and then turns to the step (3-4);
(3-3) the node in the blockchain network sends the verification code generated in the step (3-1) to a third-party channel of the user, packs the address of the second transaction request, the hash value of the verification code and the verification code number into a third transaction request, and then goes to the step (3-4);
(3-4) the node in the blockchain network sends the third transaction request to the blockchain network.
Preferably, step (4) comprises the sub-steps of:
(4-1) a node setting counter i ═ 1 in the blockchain network;
(4-2) the nodes in the block chain network judge whether the counter i is larger than the number of the specified verification codes, if so, the process is ended, otherwise, the step (4-3) is carried out;
(4-3) randomly generating a verification code by a node in the blockchain network, analyzing the address of the second transaction request from the received third transaction request, acquiring the address of the first transaction request according to the address of the second transaction request, judging whether to select information of friends of the user in the blockchain network or select a third-party channel of the user according to the address of the first transaction request, and if the former is selected, entering the step (4-4), and if the latter is selected, entering the step (4-5);
(4-4) the node in the blockchain network encrypts the verification code by using the public key of the friend in the information in the blockchain network, sends the encryption result to the friend, packs the address of the third transaction request, the encryption result and the current verification code number i +1 into the third transaction request, and then goes to the step (4-6);
(4-5) the node in the blockchain network sends the verification code generated in the step (3-1) to a third-party channel of the user, packs the address of the third transaction request, the hash value of the verification code and the verification code number i +1 into the third transaction request, and then goes to the step (4-6);
(4-6) the node in the blockchain network sends the third transaction request obtained in the step (4-5) to the blockchain network, sets i to i +1, and returns to the step (4-2).
According to another aspect of the present invention, there is provided a blockchain transfer verification system based on multi-party verification, including:
the system comprises a first module, a second module and a third module, wherein the first module is arranged in a client and used for sending a first transaction request when registering to a blockchain network, and the first transaction request comprises a third-party channel of a user operating the client, information of friends of the user in the blockchain network, the minimum verification code matching number N and the designated verification code number N;
the second module is arranged in the client and used for sending a second transaction request to the blockchain network, wherein the second transaction request comprises a target transaction party, a transaction amount and an address of a first transaction request submitted by the client when the client registers in the blockchain network;
a third module, which is arranged in a node in the block chain network, and is used for generating a verification code according to a second transaction request from the client, setting a verification code number for the verification code, constructing a third transaction request according to the verification code and the verification code number, and sending the third transaction request to the block chain network;
a fourth module, configured to be disposed in a node in the blockchain network, configured to construct a plurality of third transaction requests according to the received third transaction requests until a total number of the third transaction requests is equal to the number of the specified verification codes, and send all the third transaction requests to the blockchain network;
the fifth module is arranged in the client and used for continuously acquiring the verification codes from the third-party channel and the friends of the user and judging whether the number of the acquired verification codes is greater than or equal to the minimum verification code matching number, if so, the sixth module is switched to, and otherwise, the fifth module is continuously repeated;
a sixth module, disposed in the client, configured to package all the verification codes obtained from the third-party channel of the user and the addresses of all the third transaction requests into a fourth transaction request, and send the fourth transaction request to the blockchain network;
and the seventh module is arranged in a node in the block chain network and used for analyzing the fourth transaction request to obtain all the addresses and all the verification codes of the third transaction request, obtaining the hash value of each verification code according to the addresses of all the third transaction requests, verifying the corresponding verification code according to the hash value of each verification code, judging whether the total number of the verification codes passing the verification is greater than or equal to the minimum verification code matching number, if so, allowing the user to execute the transfer operation of the corresponding transaction amount to the target transaction party, ending the process, otherwise, refusing the user to execute the transfer operation, and ending the process.
Preferably, the lowest verification code matching number N and the specified verification code number N need to satisfy the following relationship: n is more than or equal to N.
Preferably, the third module comprises:
the first sub-module is arranged in a node in the blockchain network and used for randomly generating a verification code, analyzing the address of the first transaction request from the second transaction request, judging whether to select the information of friends of the user in the blockchain network or select a third-party channel of the user according to the address, and entering the second sub-module if the former is selected and entering the third sub-module if the latter is selected;
the second sub-module is arranged in a node in the blockchain network and used for encrypting the verification code by using a public key of the friend in the information in the blockchain network, sending an encryption result to the friend, packaging an address of the second transaction request, the encryption result and a verification code number (the value of which is 1) into a third transaction request and then switching to a fourth sub-module;
the third sub-module is arranged in a node in the block chain network and used for sending the verification code generated by the first sub-module to a third-party channel of the user, packaging the address of the second transaction request, the hash value of the verification code and the verification code number into a third transaction request and then switching to the fourth sub-module;
and the fourth submodule is arranged in a node in the blockchain network and used for sending the third transaction request to the blockchain network.
Preferably, the fourth module comprises:
a fifth sub-module, disposed in a node in the blockchain network, for setting a counter i equal to 1;
the sixth submodule is arranged in a node in the block chain network and used for judging whether the number of the counters i is larger than the number of the specified verification codes or not, if so, the process is finished, and if not, the seventh submodule is started;
a seventh sub-module, which is arranged in a node in the blockchain network and used for randomly generating a verification code, analyzing the address of the second transaction request from the received third transaction request, acquiring the address of the first transaction request according to the address of the second transaction request, and judging whether to select the information of friends of the user in the blockchain network or to select a third-party channel of the user according to the address of the first transaction request, wherein if the former is selected, the eighth sub-module is entered, and if the latter is selected, the ninth sub-module is entered;
the eighth submodule is arranged in a node in the blockchain network and used for encrypting the verification code by using a public key of the friend in the information in the blockchain network, sending an encryption result to the friend, packaging an address of the third transaction request, the encryption result and the current verification code number i +1 into a third transaction request, and then switching to the tenth submodule;
the ninth sub-module is arranged in a node in the block chain network and used for sending the verification code generated in the first sub-module to a third-party channel of the user, packaging the address of the third transaction request, the hash value of the verification code and the verification code number i +1 into the third transaction request and then switching to the tenth sub-module;
and the tenth submodule is arranged in a node in the block chain network and used for sending the third transaction request obtained by the ninth submodule to the block chain network, setting i to be i +1 and returning to the sixth submodule.
In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:
1. the invention can solve the technical problem of inconvenient use caused by the need of a user to memorize and input a complex private key in the prior block chain transaction process: because the invention adopts the step (1) and the step (7), the third-party channel is used for verification, the user only needs to acquire verification information through the friend relationship and the third-party channel (mobile phone, mailbox and the like) of the user, and does not need to memorize a private key or a complex password, thereby reducing the memory cost of the user on one hand, and avoiding the asset loss of the user caused by forgetting the private key on the other hand, thereby increasing the convenience of the user operation.
2. The invention can solve the technical problems that the private key is easy to attack and the security of the digital assets is difficult to ensure caused by the fact that the existing user backs up the private key on a third-party platform: because the invention adopts the step (1), the step (3) and the step (4), the friend relationship of the user and the third-party channel (mobile phone, mailbox and the like) of the user are used for verification, the private key of the user does not need to be obtained, meanwhile, verifiers all come from multiple parties, and the possibility that an illegal user colludes to steal the private key of the user is reduced, therefore, the invention has higher safety.
3. The operation of the user on the system of the invention is similar to that on the traditional centralized platform, so the system accords with the habit of the user and has better user experience.
4. The identity authentication method randomly selects the miners' verifiers based on the consensus mechanism, simply and efficiently realizes identity authentication without using a private key, converts the traditional third-party centralized authentication method into a decentralization identity authentication scheme dominated by miners, and solves the problem that the central verifier counterfeits real identity.
Drawings
FIG. 1 is a flow chart of the blockchain transfer verification method based on multi-party verification of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The technical terms of the present invention are explained and explained first.
Special transaction: the transaction with other special functions is realized in a transaction form, and the transaction with the functions of initiating a transfer request, sending a verification code, checking the transfer and the like is realized.
Channel: the method is used for verifying the user identity and comprises a friend channel of a user operating a client and a third-party channel of the user, wherein the friend channel of the user refers to the friend relationship of the user, and the third-party channel of the user refers to a mailbox or a mobile phone number of the user.
As shown in fig. 1, the present invention provides a block chain transfer verification method based on multi-party verification, which includes the following steps:
(1) the method comprises the steps that a client sends a transaction request X when registering to a blockchain network, wherein the transaction request X comprises a third-party channel of a user operating the client, information of friends of the user in the blockchain network (the information comprises addresses of the friends in the blockchain network and public keys of the friends in the blockchain network), the matching number N of the lowest verification codes and the number N of designated verification codes; the minimum verification code matching number N and the designated verification code number N need to satisfy the following relations: n is more than or equal to N;
(2) the client sends a transaction request A to the blockchain network, wherein the transaction request A comprises a target transaction party, a transaction amount and an address of a transaction request X submitted by the client when the client registers in the blockchain network;
(3) a node in the block chain network generates a verification code according to a transaction request A from a client, sets a verification code number for the verification code, constructs a transaction request B according to the verification code and the verification code number, and sends the transaction request B to the block chain network;
specifically, this step includes the following substeps:
(3-1) randomly generating a verification code by a node in the blockchain network, analyzing the address of the transaction request X from the transaction request A, judging whether to select the information of friends of the user in the blockchain network or select a third-party channel of the user according to the address, if the former is selected, entering the step (3-2), and if the latter is selected, entering the step (3-3);
(3-2) the node in the blockchain network encrypts the verification code by using the public key of the friend in the information in the blockchain network, sends the encryption result to the friend, packages the address of the transaction request A, the encryption result and the verification code number (the value of which is 1) into a transaction request B, and then proceeds to the step (3-4);
(3-3) the node in the block chain network sends the verification code generated in the step (3-1) to a third-party channel of the user, packs the address of the transaction request A, the hash value of the verification code and the verification code number (the value of the verification code number is 1) into a transaction request B, and then turns to the step (3-4);
(3-4) the node in the blockchain network sends the transaction request B to the blockchain network.
(4) The nodes in the block chain network construct a plurality of transaction requests B according to the received transaction requests B until the total number of the transaction requests B is equal to the number of the specified verification codes, and send all the transaction requests B to the block chain network;
specifically, this step includes the following substeps:
(4-1) a node setting counter i ═ 1 in the blockchain network;
(4-2) the nodes in the block chain network judge whether the counter i is larger than the number of the specified verification codes, if so, the process is ended, otherwise, the step (4-3) is carried out;
(4-3) randomly generating a verification code by a node in the blockchain network, analyzing the address of the transaction request A from the received transaction request B, acquiring the address of the transaction request X according to the address of the transaction request A, judging whether to select the information of friends of the user in the blockchain network or select a third-party channel of the user according to the address of the transaction request X, and if the former is selected, entering the step (4-4), and if the latter is selected, entering the step (4-5);
(4-4) the node in the blockchain network encrypts the verification code by using the public key of the friend in the information in the blockchain network, sends the encryption result to the friend, packages the address of the transaction request B, the encryption result and the current verification code number (the value of which is i +1) into the transaction request B, and then proceeds to the step (4-6);
(4-5) the node in the blockchain network sends the verification code generated in the step (3-1) to a third-party channel of the user, and packages the address of the transaction request B, the hash value of the verification code and the verification code number (which is equal to i +1) into the transaction request B, and then the step (4-6) is carried out;
(4-6) the node in the blockchain network sends the transaction request B obtained in the step (4-5) to the blockchain network, sets i to i +1, and returns to the step (4-2);
(5) the client side continuously obtains the verification codes from the third-party channel and the friends of the user, judges whether the number of the obtained verification codes is larger than or equal to the minimum verification code matching number, if so, the step (6) is carried out, and otherwise, the step (5) is continuously repeated;
(6) the client packs all verification codes acquired from a third-party channel and friends of a user and addresses of all transaction requests B into a transaction request C, and sends the transaction request C to the block chain network;
(7) analyzing the transaction request C by a node in the block chain network to obtain the addresses and all verification codes of all transaction requests B, obtaining the hash value of each verification code according to the addresses of all transaction requests B, verifying the corresponding verification code according to the hash value of each verification code, judging whether the total number of the verification codes passing the verification is greater than or equal to the minimum verification code matching number, if so, allowing the user to execute the transfer operation of the corresponding transaction amount to the target transaction party, and ending the process, otherwise, refusing the user to execute the transfer operation, and ending the process.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A block chain transfer verification method based on multi-party verification is characterized by comprising the following steps:
(1) the method comprises the steps that a client sends a first transaction request when registering to a blockchain network, wherein the first transaction request comprises a third-party channel of a user operating the client, information of friends of the user in the blockchain network, the minimum verification code matching number N and the designated verification code number N;
(2) the client sends a second transaction request to the blockchain network, wherein the second transaction request comprises a target transaction party, a transaction amount and an address of a first transaction request submitted by the client when the client registers in the blockchain network;
(3) a node in the block chain network generates a verification code according to a second transaction request from a client, sets a verification code number for the verification code, constructs a third transaction request according to the verification code and the verification code number, and sends the third transaction request to the block chain network;
(4) the nodes in the block chain network construct a plurality of third transaction requests according to the received third transaction requests until the total number of the third transaction requests is equal to the number of the specified verification codes, and all the third transaction requests are sent to the block chain network;
(5) the client side continuously obtains the verification codes from the third-party channel and the friends of the user, judges whether the number of the obtained verification codes is larger than or equal to the minimum verification code matching number, if so, the step (6) is carried out, and otherwise, the step (5) is continuously repeated;
(6) the client packs all verification codes acquired from a third-party channel and friends of the user and addresses of all third transaction requests into a fourth transaction request, and sends the fourth transaction request to the blockchain network;
(7) and analyzing the fourth transaction request by a node in the block chain network to obtain all the addresses and all the verification codes of the third transaction request, obtaining the hash value of each verification code according to all the addresses of the third transaction request, verifying the corresponding verification code according to the hash value of each verification code, judging whether the total number of the verification codes passing the verification is greater than or equal to the minimum verification code matching number, if so, allowing the user to execute the transfer operation of the corresponding transaction amount to the target transaction party, and ending the process, otherwise, refusing the user to execute the transfer operation, and ending the process.
2. A blockchain transfer verification method as claimed in claim 1 wherein the minimum verification code matching number N and the specified verification code number N are required to satisfy the following relationship: n is more than or equal to N.
3. A blockchain transfer verification method as claimed in claim 1 wherein step (3) includes the substeps of:
(3-1) randomly generating a verification code by a node in the blockchain network, analyzing the address of the first transaction request from the second transaction request, judging whether to select the information of the friends of the user in the blockchain network or select a third-party channel of the user according to the address, if the former is selected, entering the step (3-2), and if the latter is selected, entering the step (3-3);
(3-2) the node in the blockchain network encrypts the verification code by using the public key of the friend in the information in the blockchain network, sends the encryption result to the friend, packages the address of the second transaction request, the encryption result and the verification code number (the value of which is 1) into a third transaction request, and then turns to the step (3-4);
(3-3) the node in the blockchain network sends the verification code generated in the step (3-1) to a third-party channel of the user, packs the address of the second transaction request, the hash value of the verification code and the verification code number into a third transaction request, and then goes to the step (3-4);
(3-4) the node in the blockchain network sends the third transaction request to the blockchain network.
4. A blockchain transfer verification method as claimed in claim 3 wherein step (4) includes the substeps of:
(4-1) a node setting counter i ═ 1 in the blockchain network;
(4-2) the nodes in the block chain network judge whether the counter i is larger than the number of the specified verification codes, if so, the process is ended, otherwise, the step (4-3) is carried out;
(4-3) randomly generating a verification code by a node in the blockchain network, analyzing the address of the second transaction request from the received third transaction request, acquiring the address of the first transaction request according to the address of the second transaction request, judging whether to select information of friends of the user in the blockchain network or select a third-party channel of the user according to the address of the first transaction request, and if the former is selected, entering the step (4-4), and if the latter is selected, entering the step (4-5);
(4-4) the node in the blockchain network encrypts the verification code by using the public key of the friend in the information in the blockchain network, sends the encryption result to the friend, packs the address of the third transaction request, the encryption result and the current verification code number i +1 into the third transaction request, and then goes to the step (4-6);
(4-5) the node in the blockchain network sends the verification code generated in the step (3-1) to a third-party channel of the user, packs the address of the third transaction request, the hash value of the verification code and the verification code number i +1 into the third transaction request, and then goes to the step (4-6);
(4-6) the node in the blockchain network sends the third transaction request obtained in the step (4-5) to the blockchain network, sets i to i +1, and returns to the step (4-2).
5. A blockchain transfer verification system based on multi-party verification, comprising:
the system comprises a first module, a second module and a third module, wherein the first module is arranged in a client and used for sending a first transaction request when registering to a blockchain network, and the first transaction request comprises a third-party channel of a user operating the client, information of friends of the user in the blockchain network, the minimum verification code matching number N and the designated verification code number N;
the second module is arranged in the client and used for sending a second transaction request to the blockchain network, wherein the second transaction request comprises a target transaction party, a transaction amount and an address of a first transaction request submitted by the client when the client registers in the blockchain network;
a third module, which is arranged in a node in the block chain network, and is used for generating a verification code according to a second transaction request from the client, setting a verification code number for the verification code, constructing a third transaction request according to the verification code and the verification code number, and sending the third transaction request to the block chain network;
a fourth module, configured to be disposed in a node in the blockchain network, configured to construct a plurality of third transaction requests according to the received third transaction requests until a total number of the third transaction requests is equal to the number of the specified verification codes, and send all the third transaction requests to the blockchain network;
the fifth module is arranged in the client and used for continuously acquiring the verification codes from the third-party channel and the friends of the user and judging whether the number of the acquired verification codes is greater than or equal to the minimum verification code matching number, if so, the sixth module is switched to, and otherwise, the fifth module is continuously repeated;
a sixth module, disposed in the client, configured to package all the verification codes obtained from the third-party channel of the user and the addresses of all the third transaction requests into a fourth transaction request, and send the fourth transaction request to the blockchain network;
and the seventh module is arranged in a node in the block chain network and used for analyzing the fourth transaction request to obtain all the addresses and all the verification codes of the third transaction request, obtaining the hash value of each verification code according to the addresses of all the third transaction requests, verifying the corresponding verification code according to the hash value of each verification code, judging whether the total number of the verification codes passing the verification is greater than or equal to the minimum verification code matching number, if so, allowing the user to execute the transfer operation of the corresponding transaction amount to the target transaction party, ending the process, otherwise, refusing the user to execute the transfer operation, and ending the process.
6. A blockchain transfer verification system as claimed in claim 5 wherein the minimum verification code matching number N and the specified verification code number N are required to satisfy the following relationship: n is more than or equal to N.
7. A blockchain transfer verification system as claimed in claim 5 wherein the third module includes:
the first sub-module is arranged in a node in the blockchain network and used for randomly generating a verification code, analyzing the address of the first transaction request from the second transaction request, judging whether to select the information of friends of the user in the blockchain network or select a third-party channel of the user according to the address, and entering the second sub-module if the former is selected and entering the third sub-module if the latter is selected;
the second sub-module is arranged in a node in the blockchain network and used for encrypting the verification code by using a public key of the friend in the information in the blockchain network, sending an encryption result to the friend, packaging an address of the second transaction request, the encryption result and a verification code number (the value of which is 1) into a third transaction request and then switching to a fourth sub-module;
the third sub-module is arranged in a node in the block chain network and used for sending the verification code generated by the first sub-module to a third-party channel of the user, packaging the address of the second transaction request, the hash value of the verification code and the verification code number into a third transaction request and then switching to the fourth sub-module;
and the fourth submodule is arranged in a node in the blockchain network and used for sending the third transaction request to the blockchain network.
8. A blockchain transfer verification method as in claim 7 wherein the fourth module includes:
a fifth sub-module, disposed in a node in the blockchain network, for setting a counter i equal to 1;
the sixth submodule is arranged in a node in the block chain network and used for judging whether the number of the counters i is larger than the number of the specified verification codes or not, if so, the process is finished, and if not, the seventh submodule is started;
a seventh sub-module, which is arranged in a node in the blockchain network and used for randomly generating a verification code, analyzing the address of the second transaction request from the received third transaction request, acquiring the address of the first transaction request according to the address of the second transaction request, and judging whether to select the information of friends of the user in the blockchain network or to select a third-party channel of the user according to the address of the first transaction request, wherein if the former is selected, the eighth sub-module is entered, and if the latter is selected, the ninth sub-module is entered;
the eighth submodule is arranged in a node in the blockchain network and used for encrypting the verification code by using a public key of the friend in the information in the blockchain network, sending an encryption result to the friend, packaging an address of the third transaction request, the encryption result and the current verification code number i +1 into a third transaction request, and then switching to the tenth submodule;
the ninth sub-module is arranged in a node in the block chain network and used for sending the verification code generated in the first sub-module to a third-party channel of the user, packaging the address of the third transaction request, the hash value of the verification code and the verification code number i +1 into the third transaction request and then switching to the tenth sub-module;
and the tenth submodule is arranged in a node in the block chain network and used for sending the third transaction request obtained by the ninth submodule to the block chain network, setting i to be i +1 and returning to the sixth submodule.
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