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What is Slashing in Blockchain and Crypto?

Slashing is when the stake delegated to a validator node gets reduced - typically by burning (destroying) the staked tokens - as agreed under consensus majority by the rest of the network.

This is a security feature that can be implemented within delegated proof of stake systems to encourage validators to behave honestly or reliably, e.g. not sign a double spend transaction.

Slashing is highly complicated.

Further reading: