Peercoin

Peercoin, also known as PPCoin or PPC, is a peer-to-peer cryptocurrency utilizing both proof-of-stake and proof-of-work systems.

Peercoin
The Peercoin logo
Denominations
Subunit
 0.001mPPC (millicoin)
 0.000001μPPC (microcoin)
 0.000001Smallest unit
PluralPPC, Peercoins
SymbolⱣ
NicknamePeercoin, PPCoin
Demographics
Date of introduction12 August 2012, 17:57:38 UTC
User(s)International
Issuance
Central bank(Decentralized) None. Peercoin tokens are issued by stakeholders while the currency is regulated by a central authority through checkpointing.
Valuation
InflationLimited release rate plus 1% inflation due to the proof-of-stake system.[1]
 MethodProof-of-stake

Peercoin is based on an August 2012 paper which listed the authors as Scott Nadal and Sunny King. King, who also created Primecoin, is a pseudonym.[2] The Peercoin source code is distributed under the MIT/X11 software license.

In the proof-of-stake system, new coins are generated based on the holdings of individuals. In other words, someone holding 1% of the currency will generate 1% of all proof-of-stake coin blocks. This has the effect of making a monopoly more costly, and separates the risk of a monopoly from proof-of-work mining shares.[3]

Economics

Proof-of-work and proof-of-stake both serve as means of distributing new coins.

A transaction fee prevents spam and is burned (instead of being collected by a miner), benefiting the overall network.

To recover from lost coins and to discourage hoarding, the currency supply targets growth at 1% per year in the long run.

References
  1. "Wary of Bitcoin? A guide to some other cryptocurrencies". Wired.co.uk. 2013-05-12.
  2. Popper, Nathaniel (24 November 2013). "In Bitcoin's orbit: Rival virtual currencies vie for acceptance". The New York Times. Retrieved 25 February 2014.
  3. "Wary of Bitcoin? A guide to some other cryptocurrencies". Arstechnica. 2013-05-11.
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