---
title: UTU 已确认决策
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tags:
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- 关键
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---

# UTU 关键决策

- **服务器中转（SYS‑06）**：所有业务数据通过服务器中转，客户端之间不使用 P2P 直连。
- **端到端加密（SEC‑01）**：发送端加密，接收端解密；服务器仅转发密文。
- **元数据可见性（SEC‑06、SEC‑07）**：服务器可见连接时间、IP、成员关系等，断开后不得永久保留。
- **KISS & YAGNI**：遵循最简正确实现，复用现有框架，避免为未来假设需求添加依赖。

以上决策均基于用户确认的业务需求，并在后续决策文档中得到确认。