1) Alternative currency 
Peercoin, also known as PPCoin, is a peer-to-peer cryptocurrency utilizing proof-of-stake and proof-of-work systems. Peercoin is based on an August 2012 paper which listed the authors as Scott Nadal and Sunny King. Sunny King, who also created Primecoin, is a pseudonym. Nadal`s involvement had diminished by November 2013, leaving King as Peercoin....