Or Sattath, Assistant Professor at Ben-Gurion University, talks about Quantum Cryptography and its implications for existing cryptography. They discuss Quantum Computing, Proof-of-work systems, game theory of mining, and the insecurity of quantum Bitcoin mining. They also explore Grover's Algorithm, block propagation, strategy and drawbacks in Quantum Cryptography, disruptive effects of Quantum Computing on cryptographic protocols, and the concept of a Quantum Canary.