Problem
"A Smart Contract is simply an algorithm that exists within a (mostly) secure and immutable block chain. If X happens, then Y will automatically happen in response. One application would be a substantial simplification of ownership transfer. For example, the purchase of a car from an unknown buyer. "
a) First, is or is not a block chain (e.g., Ethereum) secure? Why or why not?
b) What does immutable mean and how is a block chain (e.g., Ethereum) immutable?
c) How might a smart contract facilitate the purchase of a car? What might be the advantages to this approach?