There are many functions that prevent a block from being modified once it has been added to the blockchain. For instance, the hash of each block is generated using the data within the block, so if any data is changed within the block, the hash will also change. Each block contains the hash of the previous block, so if any block is modified, all subsequent blocks will have invalid hashes. This would make it impossible to modify any data within the blockchain without invalidating the entire chain.

Other related questions:

Q: Can Block be modified in blockchain?

A: Yes, the contents of a block can be modified, but the block itself cannot be changed once it has been added to the blockchain.

Q: How does blockchain prevent illegal data modification?

A: Blockchain technology ensures that data is immutable, meaning it cannot be modified or tampered with. This makes it ideal for ensuring the integrity of data, particularly when it comes to financial transactions.

Q: How does blockchain prevent tampering?

A: Blockchain technology uses a distributed ledger system that allows for tamper-proof record keeping. This means that once data is entered into the blockchain, it cannot be altered or deleted. This makes it an ideal platform for storing sensitive data, as it cannot be tampered with by anyone.


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