Nothing-at-Stake Attack
Nothing-at-Stake Attack

One issue that can arise with PoS networks that have no penalties/slashing in place for misbehavior, is the “nothing-at-stake” problem. If validators can’t be economically penalized, they can vote on conflicting blockchain histories, thereby preventing consensus from being achieved. In such a case, validators have nothing to lose by voting for multiple blockchain histories, thereby preventing consensus from being achieved.

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Protocol Mechanics
For better classification, differentiation and comparability of different Blockchain networks, we identified different Protocol Mechanics.
Staking Mechanics
Staking Mechanics refer to the token economics, which is a new branch of the economy that explains the structure of a particular ecosystem in the blockchain sphere. It describes the study, design, and implementation of economic systems built on blockchain technology. Each platform and blockchain application is developed under its own token-economics model. Proof-of-Stake blockchains not only differ in terms of their 'Protocol Mechanics', but also in terms of certain staking-related parameters, e.g. their reward or inflation rate as well as certain actions that are required by delegators.
Staking Risks
Staking your digital assets is not a risk-free endeavor. Please make sure to review all the risks involved before you start your staking operations and make sure to properly research the validator that you want to stake with.