A Blockchain-based Trustworthy Federated Learning Privacy Protection Scheme

With the emergence of distributed machine learning, federated learning has become a prevalent paradigm for multiparty collaborative training scenarios. To address security vulnerabilities such as imperfect encryption and incapability to withstand attacks within existing federated learning architectures, a blockchain-based trustworthy federated learning architecture is proposed. The architecture utilizes a threshold variant of the Paillier encryption scheme to protect the local and global model updates. A flexible Multi-Krum selection scheme is also proposed for balancing the utility of the overall architecture while ensuring safe federated learning training processes. Based on theoretical analysis and experimental results, the proposed architecture demonstrates a high level of security and the feasibility of the scheme is supported.