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paperSeptember 2026Unreviewed

Deep-Fake CAPTCHA: Mitigating Next-Generation Social Engineering Attacks

Guy Frankovits, Lior Yasur, Fred M. Grabovski, Yisroel Mirsky

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Abstract

This paper presents DF-CAPTCHA, an active defense against real-time deepfake impersonation in voice and video calls. Instead of passively searching for artifacts, DF-CAPTCHA prompts the caller to perform simple challenge-response tasks that are easy for humans but difficult for current real-time deepfake systems to generate convincingly. The framework verifies the response using four criteria: realism, identity consistency, task completion, and response time. We evaluate the approach across both

Categories

Social Engineering

Cite

@misc{frankovits2026deepfake,
  title = {{Deep-Fake CAPTCHA: Mitigating Next-Generation Social Engineering Attacks}},
  author = {Guy Frankovits and Lior Yasur and Fred M. Grabovski and Yisroel Mirsky},
  year = {2026},
  month = sep,
  eprint = {2609.11404},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.11404}
}