Peercoin

• 1. Introduction

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  Peercoin arrived in 2012 with a paper that changed how cryptocurrency developers thought about securing a network. Before it, every serious blockchain relied on proof-of-work: computers racing to solve puzzles, burning electricity to earn the right to add the next block. Peercoin was the first to try something different. It introduced proof-of-stake, a mechanism where the coins you hold, not the computing power you burn, give you influence over the network. That single design decision made Peercoin notable in ways its creators may not have fully anticipated. Who was behind it? What problem were they actually solving? And how does a cryptocurrency built by someone who operates under a pseudonym earn a place in the history of the field?

• 2. The Paper and the Pseudonym

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  In August 2012, a paper appeared listing two authors: Scott Nadal and Sunny King. King is a pseudonym. The identity behind that name has never been confirmed, which places Peercoin in a tradition started by Bitcoin's own anonymous creator. King was not a one-project figure; the same pseudonym is also credited with creating Primecoin, a separate cryptocurrency.

  The source code released alongside the project carries the MIT/X11 software license, a permissive open-source license that allows anyone to study, copy, and modify the work. That choice signaled an intention for the code to be freely built upon rather than controlled.

• 3. Two Algorithms, One Network

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  Peercoin runs on both proof-of-work and proof-of-stake simultaneously, and the two systems serve distinct purposes. Proof-of-work handles the spread of new coins into circulation. Proof-of-stake secures the network itself: when a blockchain split occurs, the chain with the longest accumulated proof-of-stake coin age is the one that wins.

  In the cryptocurrency's primary years, proof-of-work carried most of the weight. Over time, the balance shifted, and proof-of-stake became the dominant force. That transition was not a sudden decision but a gradual evolution built into how the two systems interact.

• 4. Staking Economics

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  Peercoin targets a global inflation rate of 1% per year, but individual stakers typically receive between 3 and 5% annually. The gap exists because only a minority of coins are actively staked at any given time; the rewards are divided among those participants rather than spread across the entire supply.

  Each staking reward has two components. A dynamic portion makes up 75% of the reward, and a static portion accounts for the remaining 25%. The dynamic part depends on three variables: the number of coins staked, how long those coins have sat unspent, and how broadly the network is participating in staking at that moment. When global staking participation is low, the dynamic reward rises; when participation is high, it falls. The static portion is tied to the fraction of the total coin supply minted on average in a year, and it is paid regardless of stake size. As of December 2024, that static reward for a proof-of-stake block stands at approximately 1.4 PPC.

  Transaction fees in Peercoin are destroyed rather than paid to miners. Every fee that gets burned slightly reduces the total supply, a mechanism that benefits all holders across the network.