# Comparsion with Peercoin

## Comparsion with Peercoin Proof of Stake

**Peercoin** uses the setting of the age of the coin as part of the algorithm the probability of mining. In this system, the longer your Peercoins have been on your account (up to 90 days), the more power (coin age) they have to create a block. The act of "Meeting" the block requires the consumption of the dignity of the coin age, and the network determines the consensus by selecting the chain with the greatest total consumed coin age. When the Peercoin blocks are separated, the consumed coin age is returned back to the original block account.

![](/files/-MSLRjgDfoDGUYdySIth)

As a result, the cost to attack the Peercoin network is low, since the intruders can continue to try to generate blocks (called grinding the steak) until then, until they are successful. Peercoin minimizes these and other risks by centrally publishing blockchain checkpoints several times a day to "freeze" the blockchain and block transactions. Prizm does not use the coin age as part of the forging algorithm. The" chance " of creating a block by any account depends only on its current balance (which is the advantage of each account), the time since the last block (which is shared by all forging accounts) and the base target value (which is also common for all accounts).


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