In Ethereum: how the output of the transaction is signed

In a transaction on the Ethereum network, two key components are crucial for the integrity and security of the blockchain: the input transaction (Tx) and the output transaction (TxOutput). However, before these transactions can be included in the block, they must be signed by the sender. This process ensures that the identity of the sender is verified and that any changes to the data cannot be made without his consent.

To understand how this signature process works, let’s break down the steps involved:

  • Transaction Creation

    Ethereum: How is a transaction's output signed?

    : When a new transaction (Tx) is created in the Ethereum network, it includes the hash pointer of an earlier transaction (TxE), which serves as an input to Tx. This hash pointer represents the previous block or transaction in the blockchain chain.

  • Signature generation: the sender (S) of a new transaction (Tx) must generate a digital signature for the new output and signed TxE. This process involves encrypting the entire transaction, including both input and output data, using a cryptographic algorithm such as ECDSA (Elliptic Curve Digital Signature Algorithm).
  • Signature Verification

    : When a miner receives a transaction, it verifies that the digital signature generated by the sender matches the TxE hash that serves as the input to the Tx. If the signatures match, the identity of the sender is confirmed. This process ensures that any changes made to the data will not be tampered with without the sender’s knowledge or control.

  • Output Verification: The miner also verifies the signature on the outgoing transaction (TxOutput), verifying that it is a valid digital signature for the specific data being sent in that transaction. If the signatures match, then the data has been successfully changed.
  • Block creation: After both input and output transactions are signed correctly, the miner creates a new block that includes these transactions along with any other relevant information such as transaction metadata. Then the block is added to the blockchain chain.

In summary, signing the transaction output guarantees that the identity of the sender has been verified and that his actions in the blockchain have been authorized. This process helps maintain the integrity of the Ethereum network and provides users with a secure way to trust transactions on the platform.

SOLANA PROGRAM REACHED ACCOUNT

(Visited 5 times, 1 visits today)