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Explore the intricacies of over-the-phone authentication in this 22-minute conference talk from GrrCon 2018. Delve into the differences between identification and authentication, focusing on call center and phone call scenarios. Examine various authentication methods through a magic quadrant comparison, and learn about innovative solutions like Beepcard. Discover how emerging technologies such as Adobe Boko and Google Duplex are shaping the future of phone-based authentication. Gain practical insights and receive homework to further your understanding of this critical aspect of cybersecurity.