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Definition: hardware security module


A hardware security module (HSM) is a device that provides strong security for storing root keys for PKI, blockchain and other cryptographic functions. See PKI and cold wallet.




A Very Safe Place
Gemalto's SafeNet Luna HSM provides secure storage for root keys. This unit can be broken up into 100 cyrptographically isolated partitions, each acting as an independent HSM. (Image courtesy of Gemalto NV.)