Use Key Management Service (AWS KMS) to securely manage Ethereum accounts: Part 2

This article discusses how to use AWS Key Management Service (KMS) to securely manage Ethereum accounts, specifically focusing on the key generation and transaction signing process.

• The article is part two of a two-part series on managing Ethereum accounts using AWS KMS
• Demonstrates how to calculate Ethereum public addresses from KMS public keys
• Explains the process of creating offline Ethereum signatures using AWS Customer Master Key (CMK)
• Details the steps of decoding public keys, calculating Ethereum addresses, and signing transactions
• Uses a Lambda function to handle key management and transaction signing operations

The solution provides a secure method for managing Ethereum accounts by leveraging AWS KMS to handle key material and create portable, valid Ethereum signatures without exposing private keys.