Practice Test Geeks(CBSE) Certified Blockchain Security Expert Practice Test
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Enterprise Blockchain Security Flashcards

7 cards from real CBSE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Enterprise Blockchain Security flashcards as text

  1. Which consensus mechanism is most susceptible to a Sybil attack in an enterprise permissioned blockchain?

    Answer: Proof of Work (PoW)

    Proof of Work is vulnerable to Sybil attacks because an attacker can create many identities and accumulate hashing power without a trusted identity layer.

  2. In an enterprise Hyperledger Fabric deployment, what is the primary role of the Membership Service Provider (MSP)?

    Answer: Managing digital identities and access control

    The MSP defines the rules for validating identities and governs which participants are allowed to perform specific actions on the network.

  3. A company suspects that a rogue peer is endorsing fraudulent transactions. Which Hyperledger Fabric feature helps detect this?

    Answer: Endorsement policy validation at commit time

    Endorsement policies are re-validated by committing peers, so transactions endorsed by unauthorized nodes are rejected at commit time.

  4. What threat does 'transaction malleability' pose in enterprise blockchain environments?

    Answer: Altering a transaction's unique identifier before it is confirmed

    Transaction malleability allows an attacker to change a transaction's hash before confirmation, potentially enabling double-spend or replay attacks.

  5. Which approach best mitigates the risk of sensitive data exposure on a public blockchain used for enterprise supply chain?

    Answer: Using zero-knowledge proofs to verify data without revealing it

    Zero-knowledge proofs allow enterprises to prove the validity of a claim without exposing the underlying data on the public ledger.

  6. An enterprise blockchain network experiences a 51% attack scenario in its proof-of-stake system. What is the correct term for the minimum stake an attacker must control?

    Answer: 51% of total staked tokens

    In PoS, controlling more than 50% of staked tokens gives an attacker the ability to dominate block production and potentially reorganize the chain.

  7. Which security layer is most critical to configure when exposing a Hyperledger Fabric peer node to external enterprise applications?

    Answer: Mutual TLS (mTLS) for gRPC communication

    Mutual TLS ensures both the client and server authenticate each other's certificates, preventing unauthorized connections to fabric peer endpoints.