c******a
发帖数: 4400 | 2 早球的很，而且可以防范性更新
https://futurism.com/bitcoins-security-quantum-computers/
The researchers found that the application-specific integrated circuits (
ASICs) currently used by most cryptocurrency miners should be able to
maintain a speed advantage over quantum computers for the next 10 years, so
miners likely won’t be able to use quantum systems for nefarious purposes
in this manner for at least a decade.
While conventional computers don’t possess the necessary computational
power to derive a private key from a public key, quantum computers could do
it rather easily. “The elliptic curve signature scheme used by Bitcoin…
could be completely broken by a quantum computer as early as 2027,”
Aggarwal and his colleagues wrote.
Quantum computers could potentially become so powerful they require their
own kind of cryptography, but that doesn’t mean Bitcoin and today’s
encryption methods must be scrapped entirely. With some reworking, they
could be made more secure.
For starters, Hurley suggests doubling or tripling the length of
cryptographic keys. “Doubling the length of the encryption key is even more
effective in a symmetric encryption scheme,” he said. “Quantum computers
could use Grover’s Algorithm to break symmetric keys in quadratic time, but
that’s not nearly fast enough to overcome a longer key.”
According to MIT Technology Review, Bitcoin doesn’t have any plans to
revise its current security protocols just yet, but with usable quantum
computers still a decade or two away, cryptocurrency platforms have time to
reconsider their encryption methods.
“It’s easy to romanticize quantum computing. And while the technology is
closer than you think, it’s not magic,” said Hurley. “It will not be the
end of encryption, as many propose.” |
