# DP-SGD (Differential Privacy SGD) + Federated FT: Opacus + Flower

> Source: https://sukruyusufkaya.com/en/learn/fine-tuning-cookbook/ftc-dp-sgd-federated-ft
> Updated: 2026-05-14T14:43:04.061Z
> Category: Fine-Tuning Cookbook (Model-by-Model)
> Module: Part XVIII — Compliance, Governance & Red-Teaming
**TLDR:** Privacy guarantees for FT with sensitive data: DP-SGD (Opacus library) — add controlled noise to gradients, (ε, δ)-differential privacy guarantee. Federated FT (Flower) — data never reaches server, only gradients. Ideal for KVKK + health + finance. Privacy budget vs accuracy trade-off.