Core Insights - The article discusses the integration of Fully Homomorphic Encryption (FHE) with Byzantine Robust Federated Learning (BRFL) through a new framework called Lancelot, which addresses privacy and efficiency challenges in sensitive applications like finance and healthcare [2][15]. Group 1: Framework Overview - Lancelot framework combines FHE and BRFL to enable robust aggregation calculations while maintaining data privacy [2][15]. - The framework effectively addresses the high computational costs associated with traditional FHE, particularly in complex operations like sorting and aggregation [2][15]. Group 2: Innovations in Encryption and Computation - The introduction of Masked-based Encrypted Sorting allows for distance calculations and sorting of model parameters without decryption, overcoming a significant barrier in FHE applications [6][7]. - Lancelot optimizes FHE computation efficiency by improving ciphertext multiplication strategies and polynomial matrix operations, significantly reducing resource consumption [8][9]. Group 3: Hardware Optimization - The framework includes hardware deployment optimizations that reduce unnecessary computational burdens, thereby accelerating the training process [9][10]. - Specific techniques such as Lazy Relinearization and Dynamic Hoisting enhance the overall throughput of the system, achieving training time reductions from hours to minutes [12][13]. Group 4: Practical Applications and Compliance - Lancelot supports various federated robust aggregation algorithms and can integrate with differential privacy mechanisms, ensuring compliance with regulations like GDPR and HIPAA [15]. - Experimental results in medical scenarios demonstrate that Lancelot maintains diagnostic accuracy while preventing information leakage, establishing a foundation for trustworthy AI in healthcare [15].