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You could create a "green" block chain by launching a secure cryptographic enclave that broadcasts a randomness beacon into orbit. (Several of them really, with
by api 5y ago
You could create a "green" block chain by launching a secure cryptographic enclave that broadcasts a randomness beacon into orbit. (Several of them really, with the same seed.) Make it something that can be picked up by cheap SDRs. Then your block mining lottery becomes whoever can guess the next beacon output, and by being in orbit everyone can hear the beacon and it becomes extraordinarily costly (and obvious) to tamper with.
Of course that would allow extraterrestrials to cheat on coin mining...
- saba2008 5y agoAnd how does that stop sybil attacks? It's not different from no mining at all - whoever can flood the network faster wins (with signed blocks or output guesses)
- api 5y agoThere are cryptographic primitives that can be instantiated via a multiparty key signing ceremony when the satellites are commissioned and then the keys thrown away. After that, you'd have to grab a satellite and disassemble it in a clean room and use some kind of nanometer-scale logic probe to extract secret key information to Sybil attack anything.
- saba2008 5y agoSybil attack has nothing to do with stealing keys. It's just sending guesses into the network as fast as you can, to maximize chance of your guess ending up as winner.