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This quiz will check your understanding of lecture 11.

In accordance with the Coursera Honor Code, I (Anonymous Student) certify that the answers here are my own work.

Question 1

In the smart property scenario presented, where Alice sells her car to Bob via an atomic transaction:

Requires modifications to Bitcoin because there is no way for two different people who don’t trust each other to securely sign the same transaction

Bob must make sure that Alice deletes her private key so that she does not retain the ability to activate the car

Alice and Bob must be physically near the car for the transfer of control to take effect

The protocol doesn’t prove to Bob, before the sale, that the transaction output that Alice wants to sell him actually corresponds to the car he wants to buy

Question 2

Which of these are potential ways to improve security when using Bitcoin as a platform for decentralized commerce? (check all that apply)

Warranties

Reputation

Atomic exchange

Escrow and dispute mediation

Question 3

Data feeds.... (check all that apply)

can be decentralized to a degree using multisignatures

allow arbiters to assert facts about the world into the block chain

are useful for implementing decentralized prediction markets

Question 4

According to the lecture, what are some issues with using cryptography to enforce contracts? (check all that apply)

It is problematic if the state does not recognize a block chain based notion of property because the state will always be the final arbiter

Cryptographic security lacks the corrective controls of real-world security such as prosecution of criminals

The technology behind smart contracts is not powerful enough to express the logic needed for real-world contracts like derivatives

Losing a device containing your private keys could result in the inability to use your smart property

In accordance with the Coursera Honor Code, I (Anonymous Student) certify that the answers here are my own work.

You cannot submit your work until you agree to the Honor Code. Thanks!

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Bitcoin and Cryptocurrency Technologies

Bitcoin and Cryptocurrency Technologiesby Arvind Narayanan

Lecture 11 Quiz Help Center

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Bitcoin and Cryptocurrency Technologies
by Arvind Narayanan