CN111738722B - Intelligent contract generation method based on block link and by directory server - Google Patents

Intelligent contract generation method based on block link and by directory server Download PDF

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CN111738722B
CN111738722B CN202010609370.0A CN202010609370A CN111738722B CN 111738722 B CN111738722 B CN 111738722B CN 202010609370 A CN202010609370 A CN 202010609370A CN 111738722 B CN111738722 B CN 111738722B
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CN111738722A (en
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杨挺
王向宇
王宇
汪文勇
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University of Electronic Science and Technology of China
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    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/38—Payment protocols; Details thereof
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    • G06Q20/3829—Payment protocols; Details thereof insuring higher security of transaction involving key management

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Abstract

The invention discloses an intelligent contract generating method based on a block link and a directory server, which belongs to the technical field of computer networks, comprises a transaction party confirming step, a resource verifying step, a requirement submitting step and a detecting and updating step, introduces the directory server based on decentralized intelligent contracts and provides a safer anonymous scheme, further increases the effect of enhancing anonymity, and prevents personal information and routing information from being leaked.

Description

Intelligent contract generation method based on block link and by directory server
Technical Field
The invention belongs to the technical field of computer networks, and particularly relates to an intelligent contract generation method based on a block link and a directory server.
Background
The concept of Smart contracts (Smart contracts) was first proposed in the last 90's by Nick Szabo et al, i.e., to connect and run various contracts in the form of computer programs. With the advent of blockchain technology, intelligent contracts (Smart contracts) are provided with an environment for reliable execution of the intelligent contracts.
The intelligent contract can accept transaction requests and events from the outside, further generates new transactions and events by triggering and running code logic written in advance, can further call other intelligent contracts, can possibly update the state of the account book according to an execution result, cannot be forged or falsified once confirmed due to network consensus, and supports intelligent contract development languages such as a smart complete high-level language (including identity, serpent and Viper).
The function of the routing directory server is to distribute routing nodes to users, through which users communicate anonymously in the Internet network. For example, the directory server may act as a triple proxy, where the directory server client communicates with the directory server to obtain the information of the global active relay nodes, and then randomly selects nodes to form a node network, and finally reaches the target website server. When a user needs to anonymously access the Internet network, firstly accessing a directory server to obtain global relay node information comprising an IP address, a public key, an export strategy, bandwidth, online time and the like; and then randomly selecting nodes to construct a node network, negotiating a shared session key with each relay node, sending layer-by-layer encrypted information to the node network, and sending the information to the next node after each relay node is decrypted once. In this way, only the ingress node in the relay node knows the identity of the communication initiator; the intermediate node is aware of the identity of the ingress and egress nodes in the path, but not of the anonymous communication initiator and recipient. The outlet node is used as a gateway to be responsible for the connection between the node network and the application layer of the Internet network, and serves as a relay between encrypted node network transmission flow and unencrypted Internet transmission flow, so that the identity of an anonymous communication receiver is known, and anonymous communication is realized. However, the egress node holds the completely decrypted information, and faces the problem of honeypot attack.
Disclosure of Invention
Aiming at the defects of the routing directory server in the prior art, the invention provides the directory server which introduces an intelligent contract based on decentralization and provides a safer anonymous scheme, thereby further increasing the effect of enhancing anonymity and preventing personal information and routing information from being leaked.
An intelligent contract generation method by a directory server based on block links, characterized by comprising the steps of:
confirming both parties of the transaction, namely, taking a provider of a routing directory server as a party B, taking a demand party of the routing directory server as a party A, and carrying out negotiation and setting parameters of an intelligent contract, such as trade objects and money standards, by both parties A and B on the basis of a default intelligent contract template provided by a system;
a resource verification step, namely, after the two transaction parties confirm, the resources held by the second party are verified, and specifically, after the two transaction parties confirm, the intelligent contract distributes a random ID and a temporary identity certificate to the second party and writes the random ID and the temporary identity certificate into the intelligent contract; the intelligent contract encrypts the basic information and the use information of the routing directory server provided by the second party in a packet encryption mode, generates a corresponding packet password, and writes the packet password into the name of the second party for storage so as to provide the packet password to the first party;
the random ID, the temporary identity certificate, the basic information and the use information of the routing directory server are encrypted in an asymmetric encryption mode, and after the public key obtains address information, a corresponding private key and a digital signature algorithm generate a signature certificate address ownership to verify the identity of the user; before each execution, the intelligent contract will initialize the execution environment of the contract and the data of both parties of the transaction.
In the resource verification step, the basic information and the use information of the routing directory server provided by the second party are provided to the intelligent contract after being encrypted, and meanwhile, the key is also provided to the intelligent contract, and the basic information and the use information are encrypted again in a packet encryption mode after being decrypted by the intelligent contract by using the key.
The basic information comprises the duration and the network quality of the routing directory server, and the use information comprises a login key.
The intelligent contract encrypts the basic information and the use information of the routing directory server provided by the party B in a packet encryption mode, segments the use information according to the duration in the basic information of the routing directory server, and randomly generates a packet password corresponding to each segment by using an initial password;
further, when the initial password is used for randomly generating the block password corresponding to each segment, a trusted party node used for verification and notification is introduced in an election mode, and the trusted party node is a user of the routing directory server.
In the election, under the condition that 51% of nodes are online, the highest votes to be elected are trusted party nodes, and similarly, the nodes also refer to users of the routing directory server instead of the nodes corresponding to the basic information and the use information mentioned above, and all parties A and B belong to the nodes in the election process and have election rights; the trusted party node distributes the calculated value to each execution node in the process of encrypting and decrypting the basic information and the use information of the routing directory server by the intelligent contract, collects the calculation result of the execution node for reconstruction, and transmits the final result into the intelligent contract; the online nodes on the blockchain can voluntarily become execution nodes, the process is a function provided by the system for the default intelligent contract template, namely secure multi-party calculation, and preferably, the trusted party nodes and the calculation nodes are awarded certain rewards from the transaction after the transaction is completed.
A requirement submitting step, the intelligent contract after the resource verifying step enters an executable state, the first party submits a requirement to the intelligent contract, the intelligent contract distributes and sequences the weight of the basic information and the use information of the routing directory server which are encrypted in groups in the resource verifying step according to the requirement submitted by the first party, provides a plurality of groups of information with the front rank for the first party to select, the first party autonomously and randomly selects at least three groups of information to use, the intelligent contract takes effect after the asset recharging is completed, based on the privacy of the routing information, the intelligent contract distributes the encrypted data to each node for calculation, and under the condition of not revealing the information, the consistency of the calculation result is ensured, so that the first party can not obtain the data of the area data file before the successful recharging;
in the step of submitting the requirement, an intelligent contract provides an initial password for a party A, the party A decrypts the segmented password corresponding to the selected information to a purchasing time limit through the initial password, and constructs a group of network topology containing an inlet node and an outlet node from the routing directory server node corresponding to the selected information, after the indirect access of the network topology, the inlet node is invisible to the outlet node accessed by the inlet node, namely, the effect of accessing the Internet network anonymously is achieved, the network topology needs three or more groups of nodes, after the purchased route of the party A exceeds the purchased time, the party A finishes using, the intelligent contract expires, and the asset is transferred to an account of the party B;
in the step of submitting the requirement, the intelligent contract carries out weight distribution and sequencing on the basic information and the use information of the routing directory server, and after calculation is carried out through a value function according to the duration and the network quality of the basic information, sequencing is carried out according to the calculation result, corresponding prices are formulated, and the prices are sequentially provided for the first party to select.
In the step of submitting the requirement, the first party selects at least three groups of information to use to finish the asset recharging independently and randomly, the first party selects at least three groups of information randomly, after the second party identity corresponding to each group of information is decrypted and verified by the initial secret key provided by the intelligent contract, the second party passing the verification is paid, the first party obtains the initial secret key corresponding to the required route, the initial secret key is used for decrypting the block cipher by self, the route can be used, after each transaction is finished, the corresponding route information is expired, and the intelligent contract finishes the transaction.
And detecting and updating, namely completing the requirement submitting step each time, detecting and updating the primary intelligent contract information of the intelligent contract, emptying the invalid intelligent contract, receiving the information of the party A and the party B which are newly applied and added, and reestablishing the contract only from the confirmation step of the two transaction parties.
With the development of technology and the emphasis of people on privacy, anonymous access service is widely needed, while a directory server capable of providing anonymous service in the prior art is easily attacked by honeypots due to the centralized characteristic thereof.
The intelligent contract is added into the directory server, the access service is decentralized, the server elasticity is increased, the risk of honeypot attack is reduced, each user performs access by default to sign a contract, and personal information, routing information and account balance information are hidden or encrypted, so that the anonymous strength is guaranteed; the information of the active nodes is updated regularly, the optimal routing information is selected every time, the access speed of the first party node is improved, and the satisfaction degree of the first party node is increased; and a free and flexible market is provided for the B-side node, the cost is reduced, and the activity is increased.
Drawings
The foregoing and following detailed description of the invention will become more apparent when read in conjunction with the following drawings, in which:
FIG. 1 is a schematic diagram of a network topology of a routing directory server according to the present invention;
FIG. 2 is a logic diagram of node election of a trusted party according to the present invention.
Detailed Description
The technical solutions for achieving the objects of the present invention are further illustrated by the following specific examples, and it should be noted that the technical solutions claimed in the present invention include, but are not limited to, the following examples.
Example 1
As a most basic implementation scheme of the present invention, as shown in fig. 1, this embodiment discloses an intelligent contract generating method by a directory server based on a block link, which includes a transaction party confirming step, a resource verifying step, a requirement submitting step, and a detection updating step, specifically:
the confirming step of the two transaction parties comprises the steps of firstly confirming the two transaction parties, namely, taking a provider of the routing directory server as a party B, taking a demand party of the routing directory server as a party A, and carrying out negotiation and setting parameters of an intelligent contract, such as trade objects and money standards, on the basis of a default intelligent contract template provided by a system by the two transaction parties.
In the resource verification step, after the confirmation of both parties of the transaction, in order to ensure the validity of the transaction, the resource held by the party B needs to be verified, and specifically, after the confirmation step of both parties of the transaction, the intelligent contract allocates a random ID and a temporary identity certificate to the party B and writes the random ID and the temporary identity certificate into the intelligent contract; the intelligent contract encrypts the basic information and the use information of the routing directory server provided by the second party in a packet encryption mode, generates a corresponding packet password, and writes the corresponding packet password into the name of the second party for storage so as to provide the information to the first party.
And a requirement submitting step, wherein the intelligent contract after the resource verification step enters an executable state, the first party submits a requirement to the intelligent contract, the intelligent contract distributes and sequences the weight of the basic information and the use information of the routing directory server which are encrypted in groups in the resource verification step according to the requirement submitted by the first party, provides a plurality of groups of information with the front rank for the first party to select, the first party autonomously and randomly selects at least three groups of information to use, the intelligent contract takes effect after the asset recharging is completed, based on the privacy of the routing information, the intelligent contract distributes the encrypted data to each node for calculation, and under the condition of not revealing the information, the consistency of the calculation result is ensured, so that the first party cannot obtain the data of the area data file before the successful recharging.
And detecting and updating, namely finishing the requirement submitting step each time, detecting and updating the intelligent contract information once for the intelligent contract, emptying the failed intelligent contract, receiving the information of the party A and the party B which are newly applied and added, and reestablishing the contract only from the confirmation step of the two trading parties.
Example 2
As a preferable scheme of the present invention, on the basis of the technical solution of the above embodiment 1, further, the random ID and the temporary identity certificate, and the basic information and the use information of the routing directory server are encrypted by an asymmetric encryption method, and after the public key obtains the address information, a corresponding private key and a digital signature algorithm generate ownership of a signature certificate address, so as to verify the identity of the user; before each execution, the intelligent contract will initialize the execution environment of the contract and the data of both parties of the transaction.
In the resource verification step, the basic information and the use information of the routing directory server provided by the second party are provided to the intelligent contract after being encrypted, and meanwhile, the key is also provided to the intelligent contract. The basic information comprises the time length and the network quality of the routing directory server, and the use information comprises a login key. The intelligent contract uses the key to decrypt the basic information and the use information and then encrypts the basic information and the use information again in a packet encryption mode.
Further, the intelligent contract encrypts the basic information and the use information of the routing directory server provided by the second party in a packet encryption mode, segments the use information according to the duration in the basic information of the routing directory server, and randomly generates a packet password corresponding to each segment by using the initial password; preferably, when the initial password is used for randomly generating the block password corresponding to each segment, a trusted party node used for verification and notification is introduced in an election mode, and the trusted party node is a user of the routing directory server.
Specifically, as shown in the reference 2, in the election, when nodes of 51% of the proportion are online, the highest votes elected are trusted party nodes, and similarly, the nodes here also refer to users of the routing directory server, instead of the nodes corresponding to the basic information and the use information mentioned above, all parties a and b belong to nodes in the election process, and have election rights; the trusted party node distributes the calculated value to each execution node in the process of encrypting and decrypting the basic information and the use information of the routing directory server by the intelligent contract, collects the calculation result of the execution node for reconstruction, and transmits the final result into the intelligent contract; the online nodes on the blockchain can voluntarily become execution nodes, the process is a function provided by the system for the default intelligent contract template, namely secure multi-party calculation, and preferably, the trusted party nodes and the calculation nodes are awarded certain rewards from the transaction after the transaction is completed.
Furthermore, in the step of submitting the requirement, the intelligent contract provides an initial password for the first party, the first party decrypts the segmented password corresponding to the selected information to the purchase time limit through the initial password, and constructs a group of network topology containing an inlet node and an outlet node from the routing directory server node corresponding to the selected information, after the indirect access of the network topology, the inlet node is invisible to the outlet node accessed by the inlet node, namely, the effect of accessing the Internet network anonymously is achieved, the network topology needs three or more groups of nodes, after the purchased route of the first party exceeds the purchased time, the first party finishes using, the intelligent contract expires, and the asset is transferred to the account of the second party; further, for example, by using the ethernet currency, the first party stores the assets into an account corresponding to the public key, detects the balance of the account before executing the intelligent contract each time, fails the transaction if the balance is insufficient, and updates the balance state after automatically deducting a certain amount of money in normal transaction. The assets of each transaction must not be consumed by the first party, otherwise the transaction is not approved by the network. The amount is locked during the transaction is initiated but not yet confirmed.
Preferably, in the step of submitting the demand, the intelligent contract performs weight distribution and sequencing on the basic information and the use information of the routing directory server, after calculation is performed according to the duration and the network quality of the basic information through a cost function, sequencing is performed according to a calculation result, corresponding prices are formulated and sequentially provided for the first party to select, the first party autonomously and randomly selects at least three groups of information to use to complete asset recharging, the first party randomly selects at least three groups of information, after decryption and verification are performed on the second party identity corresponding to each group of information through the initial secret key provided by the intelligent contract, the verified second party is paid, the first party obtains the initial secret key corresponding to the required route, the grouping password is automatically decrypted by using the initial secret key, the route can be used, after each transaction is completed, the corresponding route information is expired, and the intelligent contract finishes the transaction.

Claims (5)

1. An intelligent contract generation method by a directory server based on block links, characterized by comprising the steps of:
confirming both parties of the transaction, namely, taking a provider of a routing directory server as a party B, taking a demand party of the routing directory server as a party A, and carrying out negotiation and setting parameters of an intelligent contract on the basis of a default intelligent contract template provided by a system by the parties A and B;
a resource verification step, namely after the confirmation of both parties of the transaction, verifying the resources held by the party B, specifically, after the confirmation of both parties of the transaction, distributing a random ID and a temporary identity certificate to the party B by an intelligent contract and writing the random ID and the temporary identity certificate into the intelligent contract; the intelligent contract encrypts the basic information and the use information of the routing directory server provided by the party B in a packet encryption mode, generates a corresponding packet password and writes the corresponding packet password into the name of the party B to be stored;
a requirement submitting step, in which a first party submits a requirement to an intelligent contract, the intelligent contract performs weight distribution and sequencing on the basic information and the use information of the routing directory server which are encrypted in groups in the resource verification step according to the requirement submitted by the first party, a plurality of groups of information with the front rank are provided for the first party to select, and the first party autonomously and randomly selects at least three groups of information to use, so that the intelligent contract becomes effective after the asset recharging is completed;
detecting and updating, namely completing the requirement submitting step each time, detecting and updating primary intelligent contract information by the intelligent contract, emptying the invalid intelligent contract, receiving information of a first party and a second party which are newly applied and added, and reestablishing only contracts from the confirmation step of the two parties of the transaction;
the random ID, the temporary identity certificate, the basic information and the use information of the routing directory server are encrypted in an asymmetric encryption mode, a public key generates a signature certificate address ownership by a corresponding private key and a digital signature algorithm after obtaining address information, and before executing each time, the intelligent contract initializes the execution environment of the contract and the data of both transaction parties;
in the resource verification step, the basic information and the use information of the routing directory server provided by the party B are provided to the intelligent contract after being encrypted, and meanwhile, the key is also provided to the intelligent contract, and the basic information and the use information are encrypted again in a packet encryption mode after being decrypted by the intelligent contract by using the key;
the basic information comprises the time length and the network quality of the routing directory server, and the use information comprises a login key;
in the step of submitting the demand, the intelligent contract performs weight distribution and sequencing on the basic information and the use information of the routing directory server, calculates according to the duration of the basic information and the network quality through a value function, sequences according to the calculation result, formulates a corresponding price and sequentially provides the price for the first party to select;
in the step of submitting the requirements, the first party selects at least three groups of information independently and randomly to use to finish asset recharging, namely the first party selects at least three groups of information randomly, and after decrypting and verifying the second party identity corresponding to each group of information through an initial secret key provided by an intelligent contract, pays the verified second party.
2. An intelligent contract generation method by a directory server based on block links according to claim 1, characterized in that: the intelligent contract encrypts the basic information and the use information of the routing directory server provided by the second party in a packet encryption mode, segments the use information according to the time length in the basic information of the routing directory server, and randomly generates a packet password corresponding to each segment by using the initial password.
3. An intelligent contract generation method by a directory server based on block links according to claim 2, characterized in that: and introducing a trusted party node for verification and notification in an election mode when the initial password is used for randomly generating the block password corresponding to each segment, wherein the trusted party node is a user of the routing directory server.
4. A block link based intelligent contract generation method by a directory server according to claim 3, wherein: in the election, under the condition that 51% of nodes are online, the highest votes elected are credible party nodes; the trusted node distributes the calculated values to each execution node in the process of encrypting and decrypting the basic information and the use information of the routing directory server by the intelligent contract, collects the calculation results of the execution nodes for reconstruction, and transmits the final results into the intelligent contract.
5. An intelligent contract generation method by a directory server based on block links according to claim 4, wherein: in the step of submitting the requirement, the intelligent contract provides an initial password for the first party, the first party cracks the segmented password corresponding to the selected information to a purchasing time limit through the initial password, and constructs a group of network topologies containing an inlet node and an outlet node by the routing directory server node corresponding to the selected information.
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