Čvc 08

Google Experimenting with Crypto for the ‘Post-Quantum Era’

Source: bitcoin

Google Experimenting with Crypto for the ‘Post-Quantum Era’

What happens to cryptography once quantum computers are everywhere? Will it still be possible to keep encrypted systems — like the Bitcoin network — secure?

Also read: The Halving Month Is Here; What Will Happen to the Bitcoin Price?

This week, Google addressed the question with a blog post titled, “Experimenting with Post-Quantum Cryptography,” which looks at how possible computing speeds in the future could compromise encryption, even today.

Quantum computing, long a computer science holy grail, promises to increase processing speeds on data operations exponentially. Rather than coding data into binary bits that must be either “1” or “0,” a quantum computer would theoretically use quantum bits (“qubits”) capable of existing in multiple states at the same time.

While this would have obvious benefits for almost every computer application in existence today — and even future applications — it presents a threat to any program that relies on cryptographic algorithms for protection, such as encrypted messages and bitcoin wallets.

Remember how it used to be OK to have a 5-letter password? Now, it’s advisable to have 20 or more characters, varying between numbers, symbols, and both upper and lowercase letters. This change in the need for password strength happened over time due to the progression of technology at its normal rate. Quantum computing would make simple password security obsolete, its processing power allowing it to crack even the toughest encryption with ease.

Such computers do have their limits, though. A more detailed research paper into the topic is available here.

What Would Quantum Computing do to Bitcoin?

The threat quantum computing poses to Bitcoin has been known and discussed in the community for a long time, to the extent that some old-timers have grown weary of the topic.

Common belief is that Bitcoin’s hashing functions (used in mining) are safe from large advancements in quantum computing, but that the elliptic curve digital signature algorithm (ECDSA) used to secure private keys could be compromised.

This would present a danger to any address containing large amounts of bitcoin, or one that is re-used often and well-known. If disposable addresses are used instead — as most modern wallet software does automatically — quantum computing would be less of a threat, though not a solution to the problem.

However, the arrival of quantum computers won’t constitute the first time Bitcoin has been affected by advancements technology. In his original white paper, Satoshi Nakamoto appeared to envisage mining on desktop CPUs, but users very quickly developed ASIC chips designed to do nothing other than solve Bitcoin’s hashing algorithm.

The Bitcoin protocol has adjusted difficulty accordingly, keeping blocks coming at roughly ten-minute intervals despite the hashing power added by ASICs. The possibility of adapting the Bitcoin network to quantum computing is not as certain, though.

Google’s Take

As Google’s post points out, this is not a threat yet — the experimental quantum computers that exist today contain only a handful of qubits and could not break current cryptographic algorithms. In fact, it is not known whether a larger-scale quantum computer is even possible, despite all the private and public sector research going into the field.

If it does become possible, though, a future quantum computer would be able to retroactively decrypt all of today’s encrypted communications — which is definitely something to think about.

Google is now experimenting with a “post-quantum key-exchange algorithm,” using it to encrypt small amounts of traffic between “bleeding edge” Chrome Canary browsers and Google’s servers. This will be on top of already-existing encryption, since the security of the post-quantum algorithm has not yet been thoroughly tested.

Don’t be Concerned Just Yet

Google’s post-quantum algorithm is called “New Hope,” but it’s just one of many possible solutions to the problem. Google wants to run its experiment with New Hope for under two years, “hopefully [replacing] it with something better” in the future.

In any case, for quantum technology to advance to the level required to break cryptographic algorithms, and for that technology to find its way to the consumer market, is expected to take decades, and that’s even if it proves to be possible.

Think about it — but don’t lose sleep over it. Yet.

Do you worry about advancements in computing technology affecting Bitcoin?

Images courtesy of D-Wave Systems via Wikimedia Commons.

The post Google Experimenting with Crypto for the ‘Post-Quantum Era’ appeared first on Bitcoinist.net.

Google Experimenting with Crypto for the ‘Post-Quantum Era’

Kvě 13

Claims of Quantum Computing Bitcoin Mining Through Coinfac Debunked

Source: bitcoin


Throughout the past few months, here has been a lot of talk about Bitcoin and quantum computing. Coinfac, a company, based in Hong Kong – allegedly owned by Palantir Technologies – wants to use quantum computing for Bitcoin mining.

Also read: Web Summit to Host Two-Day FinTech Event in Madrid

 Palantir Technologies Not Involved in Coinfac

That seems to be the big question right now, although a Palantir spokesperson mentioned there is no connection between the company and Coinfac. Hong Kong-based Coinfac claimed they will use quantum computing in the Bitcoin mining sphere very soon, although those claims seem to be ludicrous at best.

Stories like these manage to gain some traction because Palantir is working closely together with law enforcements to track terrorist funding. Keeping in mind how Homeland Security has recently – inadvertently-  unveiled their blockchain analysis task force to achieve a similar goal, the potential connection with Bitcoin became all the more intriguing.

CoinFac also promised potential investors and customers will be able to reap the benefits of the advancement sin Bitcoin mining through quantum computing. Renting this mining power does not come cheap, though, as plans start at 1 Bitcoin, and go all the way up to 100 BTC. Do keep in mind these prices reflect one year of mining power, after which the contract will expire.

Oddly enough, the Coinfac website mentions how all 50- and 100-Bitcoin plans have already sold out, indicating customers pay up to US$45,000 to mine cryptocurrency through quantum computing. Paying customers are – allegedly – giving access to this mining power through the cloud, although the company never divulges who owns the hardware or where it is located. Additionally, there is only one commercially available device of this capability, which costs roughly US$10m.

It comes as no surprise to find out Palantir Technologies does not want to be associated with Coinfac, as there is no deal between both parties. Moreover, if the mining company turns out to be a scam, it will have an adverse impact on Palantir as well, due to these unproven connections. Last but not least, the so-called founder of Coinfac – called Mike Howzer – does not exist. Or at last not in the manner the mining company is portraying him.

What are your thoughts on this story? Is Bitcoin mining through quantum computing feasible/ Let us know in the comments below!

Source: IB Times

Images courtesy of Palantir Technologies, Shutterstock

The post Claims of Quantum Computing Bitcoin Mining Through Coinfac Debunked appeared first on Bitcoinist.net.

Claims of Quantum Computing Bitcoin Mining Through Coinfac Debunked