Claude Code 使用隱寫術標記中國用戶 —— Anthropic 稱其為實驗
anthropic 在系統提示中使用隱藏信號來檢測位於中國的用戶。此次回滾顯示了實驗室為阻止模型蒸餾所採取的激進手段。
anthropic was forced to rollback a covert surveillance feature in claude code after a reddit user exposed how the tool manipulated system prompts to flag chinese connections. the code checked for asia/shanghai timezones, chinese proxy domains, and ai labs, transmitting the data via invisible character tweaks and xor encryption. anthropic defended the mechanism as a necessary experiment to prevent account abuse and distillation by competitors like deepseek and alibaba. since claude code has filesystem access, critics argued this behavior constituted a fundamental violation of trust that could lead to data exfiltration.