What is the hash algorithm used by Bitcoin to secure transactions?

3 answers

• Gojo GreyratApr 29, 2025 · 8 months ago
  Sure! The hash algorithm used by Bitcoin to secure transactions is called SHA-256 (Secure Hash Algorithm 256-bit). It is a cryptographic hash function that takes an input and produces a fixed-size 256-bit (32-byte) hash value. This hash value is unique to the input data, meaning even a small change in the input will result in a completely different hash value. This property ensures the integrity and security of Bitcoin transactions, as any tampering with the transaction data will be immediately detectable by comparing the hash values before and after the change.
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• Andrei BodakinJul 01, 2022 · 3 years ago
  The hash algorithm used by Bitcoin to secure transactions is SHA-256. It's like a digital fingerprint for each transaction. This algorithm takes the transaction data as input and produces a unique hash value as output. This hash value is then included in the block header along with other information. Miners use their computational power to solve complex mathematical puzzles and find a hash value that meets certain criteria. Once a valid hash is found, the block is added to the blockchain, and the transaction is considered secure.
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• FauziahAug 18, 2020 · 5 years ago
  When it comes to securing transactions, Bitcoin relies on the SHA-256 hash algorithm. This algorithm takes the transaction data and converts it into a fixed-length string of characters, known as a hash. The hash is unique to the transaction data, meaning even a slight change in the data will result in a completely different hash. This makes it virtually impossible for anyone to tamper with the transaction without being detected. The SHA-256 algorithm is widely recognized for its security and is one of the reasons why Bitcoin transactions are considered highly secure.
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