ABSTRACT:

Blockchains have found numerous applications in Fintech, Supply chains, and contracts because they provide an ideal secure distributed ledger without needing a central trusted party. Numerous financial instruments and virtual currencies use blockchains that use public keys for security and privacy. Quantum computing is expected to break public-key systems based on factorization difficulty quickly. So what will happen to blockchains in the coming era of quantum computing? This is the topic of this talk.

This talk covers the following topics:

• Overview
• Key Strengths of Blockchains
• Key Weaknesses of Blockchains
• How Quantum Threatens Blockchains?
• What is a Quantum?
• Quantum Bits
• Entanglement
• Quantum Random Number Generator
• Factorization on Classical Computer
• Shor's Factoring Algorithm
• Hash Function
• Inverting Hashes
• Grover's Algorithm
• How to Protect Blockchains?
• Challenges for Quantum
• Quantum Hardware
• Quantum Simulators
• Status of Shor's Algorithm
• Gartner's Hype Cycle for Compute, 2022
• Summary
• Our Papers

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