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Protecting Bitcoin from Replay Attacks.
Bitcoin is soaring. Just when it seems like the cryptocurrency has hit a new, unfathomable value, it just continues to accelerate and proliferate further. Just last month Bitcoin surpassed $5,000 for the first time. While it took seven years for the currency to hit this mark, it took just 11 days to exceed $6,000 and just four days to break $7,000. Bitcoin has already surpassed the market capitalization of Goldman Sachs, and some are predicting that Apple may be in its sights.

Of course, this value increase corresponds to Bitcoin’s increasing acceptance in the greater financial ecosystem and its improved usability for consumers. Last month, Goldman Sachs announced that it is pursuing a Bitcoin-focused trading product, and this week CME Group Inc. divulged that they are preparing a regulated Bitcoin futures product that could usher Bitcoin into the mainstream investment scene. In the 24 hours after CME Group’s release, popular crypto-exchange Coinbase added more than 100,000 users. Additionally, there are an increasing number of traditional and online retailers who are integrating Bitcoin into their payment systems, making it more usable than ever before. In short, Bitcoin is getting a lot of attention, and all this attention is necessitating a change in the fundamental structure of the currency.