Consensus Mechanisms: Implement robust consensus mechanisms, such as Proof of Work (PoW) or Proof of Stake (PoS), to prevent malicious actors from tampering with the data. These mechanisms ensure that any changes to the blockchain require the consensus of a majority of participants.
Two-Factor Authentication (2FA): Implement 2FA mechanisms to ensure that only authorized participants can access and modify the blockchain. This adds an extra layer of security to protect against MITM attacks.