<P> A proof - of - work ( PoW ) system ( or protocol , or function ) is an economic measure to deter denial of service attacks and other service abuses such as spam on a network by requiring some work from the service requester , usually meaning processing time by a computer . The concept was invented by Cynthia Dwork and Moni Naor as presented in a 1993 journal article . The term `` Proof of Work '' or POW was first coined and formalized in a 1999 paper by Markus Jakobsson and Ari Juels . An early example of the proof - of - work system used to give value to a currency is the shell money of the Solomon Islands . </P>
<P> A proof - of - work ( PoW ) system ( or protocol , or function ) is an economic measure to deter denial of service attacks and other service abuses such as spam on a network by requiring some work from the service requester , usually meaning processing time by a computer . The concept was invented by Cynthia Dwork and Moni Naor as presented in a 1993 journal article . The term `` Proof of Work '' or POW was first coined and formalized in a 1999 paper by Markus Jakobsson and Ari Juels . An early example of the proof - of - work system used to give value to a currency is the shell money of the Solomon Islands . </P>
what is the point of proof of work
what is the point of proof of work
to deter denial of service attacks and other service abuses such as spam on a network by requiring some work from the service requester , usually meaning processing time by a computer
to deter denial of service attacks and other service abuses such as spam on a network by requiring some work from the service requester , usually meaning processing time by a computer