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A hardware security module (HSM) is a physical computing device that safeguards and manages secrets (most importantly digital keys), performs encryption and decryption functions for digital signatures, strong authentication and other cryptographic functions.[1] These modules traditionally come in the form of a plug-in card (so called internal HSM) or an external device that attaches directly to a computer or network server (so called network HSM). A hardware security module contains one or more secure cryptoprocessor chips.[2][3]
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