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It is important for them to be linked to keep the network secure and ensure data integrity. Linking the blocks provides the network censorship resistance, prevention of double spends, and immutability.
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A Bitcoin block structure is comprised of the previous hash, the transaction list, and the nonce.
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Why is it important that the blocks are cryptographically linked together?
For the security of the network. So if one block is changed then all links afterwards will become broken. -
What does the block structure look like in bitcoin?
The block structure consists of the Nonse, data (transactions), previous hash, and current hash.
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The blocks are cryptographically linked to ensure security of initial transaction, and to encourage honesty. Allowing no misunderstandings as all transactions are first confirmed, linked and subject to scrutiny for authenticity.
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The block structure looks like a sequence of checks and balances linked together with mathematics and physics. Creating a sequential chain of unbreakable and indestructible links which ensures security.
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Ensures it is very difficult to maliciously edit information and also that historical information can be verified.
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Input from previous hash + Transaction list data + Transaction fees + Nonce = Hash Output
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Any small changes will be detected instantaneously and to eliminate dishonesty.
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Each block contains :
a. previous hash
b. hash
c. Transactions list
d. nonce
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Why is it important that the blocks are cryptographically linked together?
Ans: Becuase if they are not cryptographically linked together, it would be much easier for anyone to append the blockchain with a new block. Also, linking blocks together crpytographically makes it difficult to break the chain at any point of the blockchain. -
What does the block structure look like in bitcoin?
Ans: It contains data, which is a collection of transactions. It also contains the hash of the previous block and a nonce.
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What links the blocks together in particular? 
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to prevent anyone from changing or removing any data from previous block
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its a combination of nonce, previous hash and tx datas
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The hash links the blocks. Which are derived by a mathematical computation, Yes.
Correct the previous block hash is used to construct a hash of a new block.
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Linking the blocks together is exactly what makes changing the data so difficult. The further up the chain a hacker goes, the (exponentially) harder it gets to change data, as the more blocks are affected (every hash after that block would change). This preserves the integrity of the data.
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Each block contains the following data:
- Block size
- Block header
- Version
- Previous hash
- Current hash
- Timestamp
- Difficulty target
- Nonce
- Transaction counter
- Transactions (inputs / outputs)
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The blocks are cryptographically linked together to ensure that no miner can change the blockchain illegitimately. The blockchain would be growing far to fast for them to change it, then out pace the other computers which are constantly lengthening the blockchain. This is security for the blockchain.
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A Bitcoin block is composed of a block#, a nonce, transaction data from various transactions, the hash of the previous block in the blockchain, and finally, the hash for the present blockchain itself.
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Why is it important that the blocks are cryptographically linked together?
This guarantees that the values in the blocks (transactions) are intact and are valid. -
What does the block structure look like in bitcoin?
The block structure looks like a chain of blocks - previous block followed by the next. Inside each block is the hash of the previous block, nonce, transaction data
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1)By linking blocks creates security and prevents tampering.
2)Previous Hash, new transaction data, nonce, Hash of current block
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- Due to a property of blockchain, when hash of block is one of the input information of next block, when you change one block you will have to change ( re-mine ) all following blocks. This will be very difficult and expensive. Economicaly nonsens
2.Block contain:
Hash of previous block
Transactions
Nonce
Date, time
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- So that no previous block can be changed without affecting all the blocks following, making the corruption of the blockchain impossible.
- The block is composed of a hash with a value below a target value set by the network based on the current number of miners on the network. The hash is computed by a SHA-256 hashing of the previous block hash value, along with new confirmmed block transaction data, along with a random nonce value chosen by the miner to achieve the target value.
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1.) The cryptographic link prevents data from being altered by connecting all the blocks together, and breaking the link if anything is changed.
2.) The block creates a hash based on the transactions, a nonce, and the previous hash. The only way for the hash to work is for it to be under the target value.
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- The blocks need to be cryptographically linked so that the network cannot be changed. the cryptographic aspect of hash functions makes it impossible to change the block in a way that you wouldnāt break the chain.
- the Block structure has The data of the tx, previous hash function, the block hash function, time stamp, and the nonce.
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- For the protection of the blockchain. Its like the sim of all parts equal one. If you donāt have the sum, you donāt have the one (in this case - blockchain).
2.It is a block that contains the transaction(s), nonce, data, hash of previous block plus the current blockās hash.
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- So that it disincentivizes anyone from trying to alter past blocks
- The previous blockās hash + the list of transactions in the current block + the nonce = the hash of the current block
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