A financial institution is implementing a permissioned blockchain for inter-bank transfers. They are concerned about unauthorized nodes joining the network and potential data tampering by internal actors. Which risk mitigation strategy is MOST crucial for addressing these specific concerns?
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A
Implementing a Proof-of-Work consensus algorithm to make tampering computationally expensive.
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B
Establishing a robust governance framework with strict identity and access management (IAM) controls.
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C
Using hardware security modules (HSMs) for all transaction signing.
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D
Conducting frequent, automated smart contract audits to detect vulnerabilities.