Posts Tagged Mining

Faster SHA-256 ASICs using carry reduced adders

The core part of Bitcoin mining is performing a double SHA-256 hash digest and comparing the result against the target. Two years ago, in 2013, the first Bitcoin ASIC miners appeared on the market. Since then, mining ASIC technology advanced both in terms of the manufacturing technology (the node) and in terms of design, to […]

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The Bitcoin Freeze on Transaction Attack (FRONT)

Two month passed since my last post and the reason is I’ve been terribly busy working for Coinspect and also helping with Bitcoin Core security. A rainy Sunday evening is a great moment to write, so here is my new post, with some new thoughts. People are trying to understand the security guarantees Bitcoin provides. […]

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The Private Automatic Miner Backbone Protocol (PAMBA)

The need for direct connection between the main miner pools or solo-miners (which is often called the miner backbone), was discussed several times in the forums and in this blog during the last two years.  A miner backbone provides not only benefits to the network as a whole, but benefits for those miners that establish […]

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The re-design of the Bitcoin block header

Today is the third time I find an attack to the way Bitcoin uses SHA-256 to perform mining. Two of the attacks belong to a new family of attacks that involve terribly technical details about the inner workings of SHA-256. These are attacks that may impact on Bitcoin probably not before 5 years, and they […]

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