CRYPTO GLOSSARY

Double-spend problem

The risk that digital money, being only data, could be copied and sent to two different people. Bitcoin solved it without a middleman.

Double-spend problem in more detail

A digital file can be copied as many times as you like. If money were only a file, you could send the same coin to two different people. This is called the double-spend problem.

FROM LESSON 2 · 4 MIN READWhy Bitcoin was createdBitcoin solved the double-spend problem without a bank in the middle. Learn where it came from, what the white paper proposed and who Satoshi Nakamoto was.Read the lesson

All 128 terms · Checked against the lesson's sources on 8 October 2026.

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