Mod sign ECDSA

Overview

ModSignEcdsa is a module in the Veive protocol designed to validate signatures using the ECDSA (Elliptic Curve Digital Signature Algorithm) standard. ECDSA is widely used in blockchain systems for securing transactions and verifying the authenticity of messages. This module focuses specifically on validating ECDSA signatures, ensuring that transactions are signed by the rightful account owners.

Purpose

ECDSA is a cryptographic algorithm that generates a digital signature from a private key and a message. In blockchain applications, this signature proves ownership and authorizes transactions. The algorithm provides a high level of security, making it a popular choice for blockchain systems, including Bitcoin and Ethereum.

Key Components in ECDSA Signature Validation:

1. Signature: A 65-byte string that consists of the actual signature and a recovery byte, which is used to derive the public key from the signature.

2. Public Key: The public portion of the key pair, which can be derived from the signature and used to verify the signature.

3. Transaction ID: A unique identifier for the transaction, used along with the signature to recover the public key.

How ModSignEcdsa Works

The ModSignEcdsa module is responsible for validating that a transaction is signed by the account it claims to be from. This process involves:

1. Signature Length Check:

   • The module first checks if the provided signature is 65 bytes long, which is the standard length for ECDSA signatures.

2. Public Key Recovery:

   • Using the signature and the transaction ID, the module recovers the public key. This recovery process involves complex cryptographic operations that ensure the public key is correctly derived from the signature.

3. Address Verification:

   • The recovered public key is then converted into an address. The module checks if this address matches the sender's address provided in the transaction. If they match, the signature is considered valid.

This module's primary role is to provide a robust and efficient method for validating the authenticity of transactions in the Veive protocol, ensuring that only authorized transactions are processed.