- Quantum computing and Bitcoin - Bitcoin Wiki
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- Bitcoin (BTC) durch Google Quantencomputer bedroht?

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This has been bothering me for a while.

I'm a newbie in computer science, and I just found out about Grover’s algorithm, which can only be implemented on a quantum computer. Supposedly it can achieve a quadratic speedup over a classical computer, brute-forcing a solution to a n-bit symmetric encryption key in 2^n/2 iterations.

This led me to think that, by utilizing a quantum computer or quantum simulator of about 40-qubits that runs Grover's algorithm, is it possible to mine bitcoins this way? The current difficulty of bitcoin mining is about 15,466,098,935,554 (approximately 2^44), which means that it would take about 2^44*2^32=2^76 SHA256 hashes before a valid block header hash is found.

However, by implementing Grover's algorithm, we would only need to sort through 2^76/2=2^38 hashes to discover a valid block header hash. A 38-qubit quantum computer should be sufficient in this case - which means the 40-qubit quantum computer should be more than enough to handle bitcoin mining.

Therefore - is it possible to use quantum computers to mine bitcoins this way? I'm not too familiar with quantum computers, so please correct me if I missed something.......

NOTE: I am NOT asking whether it is possible to use quantum computers to break the ECDSA secp256k1 algorithm, which would effectively allow anyone to steal bitcoins from wallets. I know that this would require much more than 40 qubits, and is definitely not happening in the near-future.

Rather, I'm asking about bitcoin mining, which is a much easier problem than trying to break ECDSA secp256k1.

submitted by Palpatine88888 to QuantumComputing [link] [comments]
I'm a newbie in computer science, and I just found out about Grover’s algorithm, which can only be implemented on a quantum computer. Supposedly it can achieve a quadratic speedup over a classical computer, brute-forcing a solution to a n-bit symmetric encryption key in 2^n/2 iterations.

This led me to think that, by utilizing a quantum computer or quantum simulator of about 40-qubits that runs Grover's algorithm, is it possible to mine bitcoins this way? The current difficulty of bitcoin mining is about 15,466,098,935,554 (approximately 2^44), which means that it would take about 2^44*2^32=2^76 SHA256 hashes before a valid block header hash is found.

However, by implementing Grover's algorithm, we would only need to sort through 2^76/2=2^38 hashes to discover a valid block header hash. A 38-qubit quantum computer should be sufficient in this case - which means the 40-qubit quantum computer should be more than enough to handle bitcoin mining.

Therefore - is it possible to use quantum computers to mine bitcoins this way? I'm not too familiar with quantum computers, so please correct me if I missed something.......

NOTE: I am NOT asking whether it is possible to use quantum computers to break the ECDSA secp256k1 algorithm, which would effectively allow anyone to steal bitcoins from wallets. I know that this would require much more than 40 qubits, and is definitely not happening in the near-future.

Rather, I'm asking about bitcoin mining, which is a much easier problem than trying to break ECDSA secp256k1.

submitted by iciq to QuantumInformation [link] [comments]

Forgive me, because I don't have a lot of knowledge on computers, but from what I know, quantum computers can get a lot of information through 0-1 bit duality, and Grover operations. From this it seems like cryptography could potentially be cracked.

Are we going to end up with cryptography being attacked with cryptocurrencies, or are quantum computers just going to significantly increase hashrate efficiency? Will we end up with "Quantum" ASICs?

submitted by 1MightBeAPenguin to btc [link] [comments]
Are we going to end up with cryptography being attacked with cryptocurrencies, or are quantum computers just going to significantly increase hashrate efficiency? Will we end up with "Quantum" ASICs?

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submitted by edudafa to Bitcoin [link] [comments]

"It took 200 secs for Quantum computers to do a calculation of what it would have taken current supercomputers 10,000 years to accomplish." Does this mean that Quantum computers can speed up Bitcoin mining?

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Would quantum computers be able to mine bitcoin more efficiently than classical computers? D wave apparently is selling a 2000 qubit machine.

submitted by MetalStorm01 to BitcoinMining [link] [comments]
This is an open question, I am a big fan of Bitcoin, but I am wondering how Quantum computers will affect its mining and the security of Bitcoin? Any answers negative or positive would be appreciated

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I may be completely uneducated on the topic, but that's why I thought I would ask. Hopefully some of your responses will help me understand both quantum computing and bitcoin mining better. Thanks!

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How To Use A Quantum Computer For Bitcoin Mining? By Sumedha Bose. Quantum Computers are the next generation of computers, which have astounded everyone with their potential for solving large number of extremely complicated calculations, parallelly. But can they be used for Bitcoin Mining? To answer it simply, yes. The kind of power that Quantum computers possess, can be very easily used for a ... If a quantum computer did manage to mine all 2016 blocks, the network would simply adjust the difficulty, bottlenecking Sycamore’s further attempts. Still, in reality, the likelihood of bitcoin network being able to produce a difficulty setting of this level is improbable. Quantum Computers Could ‘Break’ Bitcoin Nevertheless, the author is right in a sense. Any attempt from a quantum ... But there is one opportunity for quantum computing. Touching the Bitcoin network would almost certainly be a touch of death. Even if a quantum computer mined merely 2016 blocks, in theory this would raise the difficulty so high that regular mining equipment would take an impossibly long time to create another 2016 blocks and reduce difficulty. Bitcoin wird mit Quantencomputern fertig. Um eine wirkliche Gefahr für Bitcoin zu werden, müsste ein Quantencomputer die zweite, weitaus wichtigere Kryptographie knacken: Die für das Mining verwendete SHA-256 Hash-Funktion. Das Fundament von Hash-Funktionen ist die Unumkehrbarkeit, sie sind also um ein vielfaches komplexer als andere ... So this brings us to how I used the quantum computer to solve the bitcoin mining problem. If you have 9 qubits, you can try out all the values from 1 to 511 simultaneously. If you had 64 bits, you could try out the hash algorithm for all possible values of x to figure out which ones when input into function f(x) lead to a result of y, or in the case of bitcoin mining, less than some target ...

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No. Sources: We’re Close to a Universal Quantum Computer, Here’s Where We're At https://www.youtube.com/watch?v=6yaY4Fw-ovM&t=403s McAfee Interview - ICO Shi... Is quantum computing a threat to Bitcoin? How can Bitcoin become more secure against a quantum computing attack? Will this upgrade require moving coins to ne... Ich habe nun damit angefangen, mich mit Bitcoin auseinander zu setzen und möchte meine Erfahrungen mit Dir teilen! Im heutigen Video sprechen wir über die Frage, ob Quantencomputer die ... Who generates the nonce? What makes it random? How is nonce-guessing important to the competitive process of mining? What happens if the hashing algorithm (SHA-256) was compromised? Is quantum ... In meinen Videos geht es um Bitcoin, Ethereum, Blockchain und Kryptowährungen generell, um Scam, Abzocke und Betrug besonders im Mining keinen Platz zu geben. Ich spreche darüber, wie du schlau ...