#Opclave How to implement biometric identification? Option 1: OP Stack

OP Stack is a set of standardized open source modules that can be assembled into a customized chain - what Optimism calls an "OP chain" - to serve any specific blockchain use case. One of the most important benefits of OP Stack for appchain developers is the simplicity of configuring aggregation and the ability to extend appchain-specific usability without cryptographic economic security.

Using OP Stack, Opclave can implement Apple signatures onto the blockchain, turning Apple devices into hardware wallets.

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