Bitcoin threatened by quantum computing? The report that sows doubt

Bitcoin in danger? – The safety of Bitcoin is based on advanced cryptography concepts. Since its inception, many users have wondered what will become of the network in the age of quantum computing. A closer situation than we thought according to the results of a Chinese study. But what is it really?

RSA-2048 cracked by Chinese researchers?

At the end of last week, a scientific paper had the effect of a bombshell in the world of Bitcoin. Thus, a group of Chinese scholars published a survey which would indicate that it is it is possible to break the RSA-2048 encryption algorithm.

In addition, this news can affect many other areas. For example, credit cards are secured by the RSA-1024 and RSA-2048 algorithms.

Of course, this is not within everyone’s reach. In fact, this study focuses on using quantum computing to break this algorithm.

As a reminder,classical calculus uses the concept of slightly whose value can be 0 or 1. In turn, thequantum computing is based on a concept of cubit representing the coherent superposition of at least two quantum ground states.

After theorizing the attack vector, the Chinese team used their own algorithm to factor a 48-bit number on a quantum computer consisting of 10 qubits.

To really risk the RSA-2048 algorithm would be needed to have a much more powerful quantum computer. According to the estimates proposed by the report, it would take a quantum computer with 372 qubits to crack RSA-2048.

By comparison, the most powerful quantum computer in existence is the IBM Osprey which has 433 qubits.

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Is Bitcoin in danger?

Soon, many experts pored over the publication back and forth looking for errors or inaccuracies.

They have so many declared skeptical of what is said in the publication. Indeed, the algorithm used by the Chinese researchers to corrupt RSA-2048 comes from another highly controversial scientific publicationas explained Bruce Schneier :

“If it is true that Chinese paper depends on this Schnorr technique which does not scale, neither will the techniques of this Chinese paper scale. »

Thus, the algorithm is based on report by Claus Schnorr. Although it claims “to be able to break the RSA encryption system”, this one limited to small orders of magnitude. Effectively, this algorithm stops working as the order of magnitude increases.

As a result, the algorithm works based on the factorization of a 48-bit number as presented in the Chinese study, but this does not make it possible to process orders of magnitude of those used by RSA -1024 or 2048.

In other words, RSA algorithms still have a bright future ahead of them before they break. On his side, Bitcoin is based on an ECDSA cipher which is comparable in complexity to RSA-3072. Therefore, the banking industry will be in trouble long before Bitcoin is corrupted.

While they wait to succeed in breaking Bitcoin’s encryption, hackers have other playing fields. Indeed, in 2022 more than $3 billion that has been stolen from the crypto ecosystem.

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