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Proof-of-Stake (PoS)
BLOCKCHAIN BASICS
Proof-of-Stake is a process where the creator of the next block is chosen in a deterministic way (a model that always produces the same output) according to its stake.

It's an alternative to PoW, with the main difference being that PoW requires miners to use their computing power to solve complex math problems, whereas PoS only requires them to show ownership of a certain amount of coins. Once users stake their coins, they become validators in the network, responsible for validating blocks. The idea behind PoS is that people who hold more coins have more at stake and thus are more likely to follow the rules.

A consensus protocol is what controls the laws and parameters governing the behavior of blockchains.
Consensus is essentially a set of rules that each network participant adheres to. As blockchains are not controlled by a single, central authority, a consensus protocol is used instead to allow distributed network participants to agree on the history of the network captured on the blockchain – to reach consensus on what has happened and continue from a single source of truth.

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Staking doesn't require huge investments in hardware or energy so it's easier to run a node.
PoS is still in its infancy, and less battle-tested, compared to proof-of-work
Staking allows for increased participation making it more decentralized.
Some people argue that Proof of stake systems are more centralized because they require users to hold a certain amount of coins in order to mine. This means that users with more money will have an advantage over others and can also dictate the direction of the network
Staking allows for secure sharding. Shard chains allow Zinnia to create multiple blocks at the same time, increasing transaction throughput. Sharding the network in a proof-of-work system would simply lower the power needed to compromise a portion of the network.

Getting PoS right is a considerable technical challenge and not as straightforward as using PoW to reach consensus across the network. For this reason, we are going to be carefully planning and integrating PoS over the next 18 months.

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How does PoS work?
What does Consensus Protocol Really Mean?
+/- of Proof-of-Stake
Zinnia PoS
A Quick Recap Before We Talk About Hybrid Consensus...