Initial commit

crates/training/rtx-federated/src/byzantine/anomaly_detection.rs

@@ -0,0 +1,55 @@
+//! Anomaly detection for Byzantine clients
+
+use super::{AnomalyMethod, ByzantineConfig, ByzantineRobust};
+use crate::aggregation::ModelUpdate;
+use crate::error::{FederatedError, Result};
+use async_trait::async_trait;
+use uuid::Uuid;
+
+#[derive(Debug)]
+pub struct AnomalyDetector {
+    threshold: f64,
+    method: AnomalyMethod,
+    min_clients: usize,
+}
+
+impl AnomalyDetector {
+    pub async fn new(threshold: f64) -> Result<Self> {
+        Ok(Self {
+            threshold,
+            method: AnomalyMethod::Statistical,
+            min_clients: 2,
+        })
+    }
+}
+
+#[async_trait]
+impl ByzantineRobust for AnomalyDetector {
+    async fn filter_updates(&self, updates: &[ModelUpdate]) -> Result<Vec<ModelUpdate>> {
+        if updates.is_empty() {
+            return Err(FederatedError::NoUpdatesCollected);
+        }
+        // Simplified: return all updates for now
+        Ok(updates.to_vec())
+    }
+
+    async fn detect_malicious_clients(&self, _updates: &[ModelUpdate]) -> Result<Vec<Uuid>> {
+        Ok(Vec::new())
+    }
+
+    fn get_robustness_config(&self) -> ByzantineConfig {
+        ByzantineConfig::AnomalyDetection {
+            threshold: self.threshold,
+            method: self.method.clone(),
+            min_clients_after_filter: self.min_clients,
+        }
+    }
+
+    async fn update_state(&mut self, _round: usize, _updates: &[ModelUpdate]) -> Result<()> {
+        Ok(())
+    }
+
+    fn name(&self) -> &'static str {
+        "AnomalyDetector"
+    }
+}