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Blockchain tampering forward
Publish: 2021-05-19 13:12:26
1. First, the characteristics of decentralization
as the name suggests, a blockchain does not need a centralized server, and all information is stored on each node in the chain in a distributed form. Even if a node is damaged or tampered, the operation of the whole blockchain will not be affected, and the data will not be disordered
Second, consensus mechanism
consensus mechanism plays an important role in the trustworthiness of data on blockchain. Due to the decentralized architecture, any two nodes in the chain do not need to trust each other's identity to establish a connection, and there is no need to trust each other for data exchange. Since all nodes in the network can act as "supervisors", there is no need to worry about fraud. When a transaction is completed, all nodes on the blockchain will synchronize this information, so the consensus mechanism is based on the distributed architecture to ensure the data can not be tampered with
Third, smart contract
before we talk about blockchain + smart contract, let's first clarify the meaning of smart contract: a set of commitments defined in digital form, on which contract participants can implement these commitments. Generally speaking, it is a smart contract. In a computer system, when certain conditions are met, the contract can be executed automatically.
as the name suggests, a blockchain does not need a centralized server, and all information is stored on each node in the chain in a distributed form. Even if a node is damaged or tampered, the operation of the whole blockchain will not be affected, and the data will not be disordered
Second, consensus mechanism
consensus mechanism plays an important role in the trustworthiness of data on blockchain. Due to the decentralized architecture, any two nodes in the chain do not need to trust each other's identity to establish a connection, and there is no need to trust each other for data exchange. Since all nodes in the network can act as "supervisors", there is no need to worry about fraud. When a transaction is completed, all nodes on the blockchain will synchronize this information, so the consensus mechanism is based on the distributed architecture to ensure the data can not be tampered with
Third, smart contract
before we talk about blockchain + smart contract, let's first clarify the meaning of smart contract: a set of commitments defined in digital form, on which contract participants can implement these commitments. Generally speaking, it is a smart contract. In a computer system, when certain conditions are met, the contract can be executed automatically.
2.
Yibao block chain technology is based on bcos open source platform, which can calculate metadata through sha-512 hash algorithm, timestamp service and pbft consensus algorithm, and flexibly expand alliance chain institutions and nodes. The data stored in the blockchain through easy preservation will be stored on the blockchain in the form of hash value. With the characteristics of decentralized and distributed storage in the blockchain, the authenticity and objectivity of the data can be effectively guaranteed, and tampering can be effectively prevented
3. 1. Blockchain is an anti tampering, shared and traceable distributed ledger technology. Anti tampering lies in that the modification of a single node can only be recognized through the consensus of other nodes; Traceability means that the whole account book of the blockchain can only be written in, not deleted, and all modification records will be left marks on the whole chain; Sharing means that the account book of the whole blockchain is transparent to multiple nodes in the distributed network
hash function in blockchain is the key to anti tampering, and hash algorithm is a one-way cryptographic mechanism to ensure that transaction information is not tampered in blockchain. After receiving a piece of plaintext, hash algorithm will transform it into a short and fixed hash data in an irreversible way. So block association has but is not limited to tamper proof
2. Quantum secure communication is divided into quantum cryptography communication, quantum teleportation and quantum dense coding. It can be divided into classical communication and quantum communication. The former mainly transmits quantum key, while the latter can be used for quantum teleportation and quantum entanglement distribution. When quantum communication is eavesdropped, although the eavesdropper can't get the information, the communication is interrupted, which affects the normal communication. His anti eavesdropping is at the cost of interrupting the communication, so it doesn't seem as good as the legend.. At present, there are still many unsolved problems in quantum communication, such as short transmission distance, relay difficulty and so on
3. In secure communication, technology competition and complementarity are mutual reference and common development. In secure communication, blockchain should belong to network layer, and quantum communication should belong to physical layer. Therefore, there should be no competition result of who will replace who.
hash function in blockchain is the key to anti tampering, and hash algorithm is a one-way cryptographic mechanism to ensure that transaction information is not tampered in blockchain. After receiving a piece of plaintext, hash algorithm will transform it into a short and fixed hash data in an irreversible way. So block association has but is not limited to tamper proof
2. Quantum secure communication is divided into quantum cryptography communication, quantum teleportation and quantum dense coding. It can be divided into classical communication and quantum communication. The former mainly transmits quantum key, while the latter can be used for quantum teleportation and quantum entanglement distribution. When quantum communication is eavesdropped, although the eavesdropper can't get the information, the communication is interrupted, which affects the normal communication. His anti eavesdropping is at the cost of interrupting the communication, so it doesn't seem as good as the legend.. At present, there are still many unsolved problems in quantum communication, such as short transmission distance, relay difficulty and so on
3. In secure communication, technology competition and complementarity are mutual reference and common development. In secure communication, blockchain should belong to network layer, and quantum communication should belong to physical layer. Therefore, there should be no competition result of who will replace who.
4. The distributed architecture and tamper proof features of blockchain technology help to solve the problems of bill authenticity and information opacity. When participants need to check whether the bill has been tampered or transferred, blockchain can provide indisputable proof of consistency
digital currency also makes use of this feature of blockchain. Puyin is a kind of tea standard digital currency developed based on blockchain technology.
digital currency also makes use of this feature of blockchain. Puyin is a kind of tea standard digital currency developed based on blockchain technology.
5. [puzzle] gold miner Chinese version
new gold digger's Chinese version...
game props: press the key to start pulling gold. The red bomb means to pull something you don't want. Press the "↑" key ~ to blow up the thing you pull yourself. The yellow bottle with three forks is strong water. It's a little faster when recycling the rope, It only takes effect in one round. The book "rocks" on it means that if you collect stones, you can sell them at a higher price than usual! 11 pieces of small stones can sell 33 pieces, which is also effective in the same game. The thing in the yellow bottle is brick oil, which will make bricks appreciate. 600 pieces of bricks will sell to 900! It's also the lucky grass that takes effect in the first round. If you use it, you can increase your lucky degree and pull it to "?" If you buy a small bag, you may become very strong, or you may get some of the above items, and sometimes even the price of stones will rise!
new gold digger's Chinese version...
game props: press the key to start pulling gold. The red bomb means to pull something you don't want. Press the "↑" key ~ to blow up the thing you pull yourself. The yellow bottle with three forks is strong water. It's a little faster when recycling the rope, It only takes effect in one round. The book "rocks" on it means that if you collect stones, you can sell them at a higher price than usual! 11 pieces of small stones can sell 33 pieces, which is also effective in the same game. The thing in the yellow bottle is brick oil, which will make bricks appreciate. 600 pieces of bricks will sell to 900! It's also the lucky grass that takes effect in the first round. If you use it, you can increase your lucky degree and pull it to "?" If you buy a small bag, you may become very strong, or you may get some of the above items, and sometimes even the price of stones will rise!
6. Player 1: s key to put the hook, W key to throw explosives
player 2: key to put the hook, W key to throw explosives.
player 2: key to put the hook, W key to throw explosives.
7. Jinwowo analyzes the security of data when using blockchain Technology: blockchain technology is a kind of technology that supports decentralization in a trustless network environment
it can ensure the security of the communication network of the application system running on the chain by means of digital signature, and use hash chain technology to ensure that the written data can not be changed.
it can ensure the security of the communication network of the application system running on the chain by means of digital signature, and use hash chain technology to ensure that the written data can not be changed.
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