270 Million Voiceprints a Month: Inside China's Listening Machine
What leaked iFlytek documents reveal about the machinery behind China's surveillance state — and how to read that kind of evidence yourself.
December 19, 2025 |
By the EPCYBER Intelligence Team
iFlytek (科大讯飞), China's largest voice-recognition company, has been on the U.S. Entity List since 2019 for human-rights violations in Xinjiang. Its ASR technology is significant enough to be tested alongside Google, Amazon, and Alibaba in recent academic security research (USENIX Security 2025). Leaked internal documents now provide the first technical proof of what that surveillance infrastructure actually looks like — and the scale is staggering.
Below, we go inside the leaked documents — the voiceprint collection, the video analysis, the vendor integration — and exactly how it was found and verified.
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Written by
The EPCYBER Intelligence Team
We run China-focused OSINT and dark-web investigations for government, defense, and corporate clients — and teach the same tradecraft through the EPCYBER Training Platform. Everything we publish comes out of real casework.
By the EPCYBER Intelligence Team
