Toward improved audio CAPTCHAs based on auditory perception and language understanding
Kolossa, 2017
Meutzner, H., Gupta, S., Nguyen, V.-H., Holz, T., & Kolossa, D. (2017). Toward Improved Audio CAPTCHAs Based on Auditory Perception and Language Understanding. ACM Transactions on Privacy and Security, 19(4), 1–31. https://doi.org/10.1145/2856820