A password management scheme considering multinetwork interaction

With the global energy structure transition and increasing emphasis on environmental protection, new energy vehicles, especially electric vehicles, have become an irreversible trend. In order to efficiently and conveniently provide power for the rapidly growing fleet of electric vehicles, multi-network interaction serves as a solution. It relies on smart grids to connect electric vehicles, charging stations, and parking facilities, optimizing energy supply. However, user usage across multiple platforms presents challenges in password management. Traditional password vault schemes pose security risks such as synchronization service failures and data breaches. Blockchain technology provides a more secure storage method. This paper proposes a model and scheme for cross-platform password management based on blockchain and smart grids, introducing an oblivious key management server to support smart grids in assisting large-scale users. The scheme enhances security through re-encryption strategies and honey password vaults, achieving secure and efficient password management in the multi-network interaction scenario. Security analysis demonstrate that the scheme is both practical and secure.