秦衣大 数字免疫系统 105 Virus- Infected 3 Virus Client Client 2 5 Machine Analyze virus Analysis Administrative Machine behavior and Machine structure Machine 6 Client Private Extract Client Machine Signature Network Machine Derive Prescription 7 Administrative Client Machine Other Client Individual Client Private User Network Figure 19.5 Digital Immune System 2022/10/9 现代密码学理论与实践-19：恶意软件 15/412022/10/9 现代密码学理论与实践-19：恶意软件 15/41 数字免疫系统