A digital signature in blockchain is a cryptographic technique used to ensure the authenticity, integrity, and non-repudiation of transactions. It involves using a private key to create a unique digital signature for a message or transaction, which can then be verified using the corresponding public key. This process ensures that the sender of the transaction is who they claim to be and that the data has not been altered during transmission. Digital signatures play a crucial role in securing blockchain transactions and preventing fraud and tampering.
