Staking is the practice of locking cryptocurrency in a proof-of-stake network so a validator can help secure the blockchain and earn rewards. The locked funds signal commitment to the network, while the validator’s keys are used to propose or attest to blocks. In many systems, staking can be done directly by the owner or through a service that runs validators on their behalf.
In cyber security, staking matters because it turns infrastructure into a high-value target. Attackers may try to steal validator keys, alter reward flows, or disrupt signing systems to cause loss, downtime, or trust damage. Defenders protect staking operations with strong access control, hardware-backed key storage, segregation of duties, monitoring for abnormal withdrawals or validator behavior, and rapid containment procedures. A compromise in staking infrastructure can affect both funds and network reliability, even when the visible on-chain loss is small.