Creator - Scott Nadal, Sunny King

Date launched - August 2012

Algorithm - Proof-of-Stake

Peercoin is a proof-of-stake currency based on some technical aspects of Bitcoin. It was designed to provide maximum transaction security while maintaining fast transaction times and a low-resource client. The first proof-of-stake coin to be released, it sparked a debate between algorithms which has remained a contentious issue among the cryptocurrency community. Forks of Peercoin, such as NeuCoin, have continued this trend, while addressing certain security issues which were left in a gray area in the original Peercoin release. 

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