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Question
What was Satoshi Nakamoto's key technical innovation in the Bitcoin whitepaper?
1
Solving the double-spend problem without a trusted central authority — allowing digital money to be transferred without requiring a bank or payment processor to verify that the same unit hadn't already been spent
2
Creating a government-independent currency that could be used for international trade without exchange rates
3
Introducing cryptographic encryption to financial transactions for the first time
4
Creating a digital currency that could be exchanged faster than traditional wire transfers
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