Device Key
Storing private keys securely in HSM (Hardware Security Module)
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Storing private keys securely in HSM (Hardware Security Module)
The device key is stored safely in the mobile device’s special secure hardware chip: HSM (Hardware Security Module). Examples of HSMs are Apple's Secure Enclave (Apple T2 chip) and Android Keystore.
The key is isolated from the mobile OS using a specialized hardware chip to protect it from any security threats, and an app can only request to sign/verify a transaction- meaning that the keys stored in HSM cannot be taken out of the hardware. Therefore, It can be seen as utilizing users’ mobile devices as a cold wallet.
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