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Can blockchain modify information
Publish: 2021-04-14 13:48:10
1. The information of each block in the blockchain is different, and the generation time and recorded data of each block are different. You can regard the blockchain as a bookkeeping book. Every once in a while, someone will write all the transaction information on the blockchain network to one page of the ledger, page by page, and record all the transactions on the blockchain network in turn according to the time
on the other hand, all nodes (computers in short) participating in the network will store one account book, which is updated in real time. Even if one node fails, the blockchain will not be affected.
on the other hand, all nodes (computers in short) participating in the network will store one account book, which is updated in real time. Even if one node fails, the blockchain will not be affected.
2. Once the information is verified and added to the blockchain, it will be stored permanently. Unless more than 51% of the nodes in the system can be controlled at the same time, the modification of the database on a single node is invalid. Therefore, the data stability and reliability of the blockchain are extremely high.
3. The data that you play chess is not sent to the server. The server still counts your time. Your software shows that you have played chess, so it shows the time of your opponent..
4. If it is the proof of workload, it can be modified, but it needs to invest a lot of money. For example, if you want to change the block data of bitcoin (such as transferring all bitcoin to your wallet, etc.), it needs to account for 51% of the total network computing power. But with so many miners digging, it is basically impossible to account for 51% of the total network computing power.
5. In theory, blockchain technology can ensure the authenticity of the original information. One of the biggest characteristics of blockchain is decentralization. The information recorded on the blockchain can not be tampered with and will be forever recorded on the blockchain
so far, no research institution or indivial claims that it can change the tamper proof characteristics of blockchain
decent, a distributed content publishing platform, uses this feature of blockchain to protect users' property rights.
so far, no research institution or indivial claims that it can change the tamper proof characteristics of blockchain
decent, a distributed content publishing platform, uses this feature of blockchain to protect users' property rights.
6. Block head, transaction details, transaction counter and block size... Are these Shenma things
blockchain is the big ledger of bitcoin network, and each block is equivalent to a page in the ledger. What information is recorded in the "account book"? At present, each block of bitcoin mainly records data such as block head, transaction details, transaction counter and block size
"block header" contains all information except transaction information, mainly including the hash value of the previous block header, which is used to ensure that blocks are connected in sequence; Time stamp: record the generation time of the block; Random number: that is, the answer to the arithmetic problem of PK for all miners in the whole network; Difficulty target: score the difficulty coefficient of the arithmetic problem
"transaction details" records in detail the transferor, income party, amount and digital signature of the transferor of each transaction, which is the main content of each block
"transaction counter" describes the number of transactions contained in each block
"block size" refers to the size of each block data. Currently, each block is limited to 1MB, which does not rule out the possibility of expansion in the future.
blockchain is the big ledger of bitcoin network, and each block is equivalent to a page in the ledger. What information is recorded in the "account book"? At present, each block of bitcoin mainly records data such as block head, transaction details, transaction counter and block size
"block header" contains all information except transaction information, mainly including the hash value of the previous block header, which is used to ensure that blocks are connected in sequence; Time stamp: record the generation time of the block; Random number: that is, the answer to the arithmetic problem of PK for all miners in the whole network; Difficulty target: score the difficulty coefficient of the arithmetic problem
"transaction details" records in detail the transferor, income party, amount and digital signature of the transferor of each transaction, which is the main content of each block
"transaction counter" describes the number of transactions contained in each block
"block size" refers to the size of each block data. Currently, each block is limited to 1MB, which does not rule out the possibility of expansion in the future.
7. Yes, it is characterized by distributed data management, which can effectively rece the probability of data tampering by others, and also realize the security management of personal information. This is what the six degree chain has been pushing.
8. Jinwowo
analysis thinks that it should be like this:
blockchain technology
is an information technology that ensures that there is no contradiction between the new registration information and the huge existing information of the whole system through the well-designed computer Internet cooperation mechanism, so as to maintain the amazing "overall consistency" of the whole system.
analysis thinks that it should be like this:
blockchain technology
is an information technology that ensures that there is no contradiction between the new registration information and the huge existing information of the whole system through the well-designed computer Internet cooperation mechanism, so as to maintain the amazing "overall consistency" of the whole system.
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