What is the easiest way to steal cryptocurrency from a user?

• A.Double-spend attack
• B.Private key theft
• C.Eclipse attack
• D.Consensus hijacking
• E.None of the above

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Multisignatures are designed to allow a set of users to make a valid transaction only if a set minimum number of them consent

• A.False
• B.True

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Quantum computers threaten traditional cryptography because they provide polynomial solutions to mathematically "hard" problems

• A.True
• B.False

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A controversial update to blockchain functionality could increase the vulnerability of the blockchain to attack

• A.True
• B.False

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The Bitcoin hack demonstrated that there are circumstances in which the principles of blockchain must be violated to protect the blockchain.

• A.False
• B.True

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