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Explore a concise presentation on two-round oblivious transfer protocols based on Computational Diffie-Hellman (CDH) or Learning Parity with Noise (LPN) assumptions. Delve into the paper by Döttling, Garg, Hajiabadi, Masny, and Wichs, presented at Eurocrypt 2020. Gain insights into basic concepts, simulation-based security, and receiver security. Examine key results, including Search OT and Indistinguishable OT, and understand the significance of these findings in the field of cryptography.