How does the SHA-256 hash algorithm contribute to the immutability of blockchain transactions?

3 answers

• Bolat MMar 12, 2025 · 3 months ago
  The SHA-256 hash algorithm is a crucial component in maintaining the immutability of blockchain transactions. It works by taking the input data, such as a transaction or a block, and producing a fixed-size output, which is the hash value. This hash value is unique to the input data, meaning that even a small change in the input will result in a completely different hash value. This property makes it virtually impossible to tamper with the data stored in a blockchain without being detected. By using the SHA-256 hash algorithm, blockchain networks can ensure that the data remains secure and unalterable, providing trust and transparency to all participants.
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• FaezehOct 23, 2024 · 8 months ago
  The SHA-256 hash algorithm is like the guardian angel of blockchain transactions. It takes the data and transforms it into a unique fingerprint, known as the hash value. This fingerprint is then stored in the blockchain, creating an immutable record of the transaction. Any attempt to modify the data would result in a different hash value, alerting the network to the tampering attempt. This makes it extremely difficult for anyone to alter or manipulate the data stored in a blockchain, ensuring the integrity and trustworthiness of the transactions.
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• anphungAug 01, 2020 · 5 years ago
  The SHA-256 hash algorithm is widely used in blockchain technology to ensure the immutability of transactions. When a transaction is added to a block, it is hashed using SHA-256, which produces a fixed-size output. This hash value is then included in the next block, creating a chain of blocks, hence the name blockchain. By including the hash value of the previous block in each subsequent block, any attempt to modify the data in a block would require recalculating the hash values of all subsequent blocks. This makes it computationally infeasible to alter the data stored in a blockchain, providing a high level of security and immutability.
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