Chris Dannen

“Hashing is more secure than encryption, at least in the sense that there exists no private key that can “reverse” a hash back into its original, readable form. Thus, if a machine doesn’t need to know the contents of a dataset, it should be given the hash of the dataset instead.”
― Chris Dannen, Introducing Ethereum and Solidity: Foundations of Cryptocurrency and Blockchain Programming for Beginners

“What Ethereum Is Good For Ethereum is suited to building economic systems in pure software. In other words, it’s software for business logic, wherein people (users) can move money (data representing value) around with the speed and scale that we normally get with data.12 Not the three- to seven-day floating period you get with the commercial banking system. Or the fees associated with vendors such as Visa, MasterCard, and PayPal. With a simple Ethereum application, for example, it is fairly trivial to pay hundreds of thousands of people, in hundreds of countries, small amounts every few minutes, whereas in the legacy banking system you would need an entire payroll department working overtime to constantly rebalance your account ledgers and deal with the cross-border issues.”
― Chris Dannen, Introducing Ethereum and Solidity: Foundations of Cryptocurrency and Blockchain Programming for Beginners