AdaptiveShield: Dynamic Defense Against Decentralized Federated Learning Poisoning Attacks

Federated learning (a system where decentralized devices train a shared AI model together while keeping their data local) is vulnerable to poisoning attacks, where malicious participants inject false data to corrupt the final model. This paper proposes AdaptiveShield, a defense system that uses dynamic detection strategies to identify attackers, automatically adjusts its sensitivity thresholds to handle different attack types, reduces damage from missed attackers by adjusting hyperparameters (settings that control how the model learns), and hides user identities through a shuffling mechanism to protect privacy.