Pavol Rusnak #cypherpunk #hacker #openhw #privacy #bitcoin #creativeAI

Trezor Emulator on Raspberry Pi

I got an idea while looking at the cool project called RaspiBlitz. They are using a nice LCD shield on top of Raspberry Pi for their Lightning Node. What if I tried running the Trezor Emulator on the same hardware setup? Trezor is completely open-source, so this should not be a big problem, right? Here is the result of my late-night experiment. And it’s beautiful!

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Longest TXID prefix collision in Bitcoin

As you probably know, transactions in Bitcoin are identified by their SHA256 hashes which are 256 bits long. These identifiers are called transaction ID or TXID. We were brainstorming a new project at SatoshiLabs and an interesting question popped up. How much can we trim TXIDs before collisions start to appear? Or in another words: can we use just the first 128 bits of the hash instead of the full hash to uniquely identify the transaction? Can we use even less bits?

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