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Welcome back! If you missed Part 1, Part 2, or Part 3 of our ‘A Programmable Blockchain’ series, follow these links to check them out! 

A Simple Login System Using Ethereum

One of the cool things about Ethereum is that addresses are, by definition, systems to prove ownership. Whoever can perform operations with an Ethereum address is the rightful owner of that address. This is, of course, the consequence of the underlying public-key infrastructure used to verify transactions. We can exploit this to create a login system based on Ethereum addresses. Let’s see how.

Source: DZone