A proof of work is a piece of data which is difficult (costly, time-consuming) to produce but easy for others to verify and which satisfies certain requirements. Producing a proof of work can be a random process with low probability so that a lot of trial and error is required on average before a valid proof of work is generated. Bitcoin uses the Hashcash proof of work system.
CITATION STYLE
van Flymen, D. (2020). Proof of Work. In Learn Blockchain by Building One (pp. 39–53). Apress. https://doi.org/10.1007/978-1-4842-5171-3_4
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