Condensed matter physicist and quantum information expert Sankar Das Sarma claimed in the MIT Technology Review that quantum computers are a long way from breaking RSA-based cryptography.

RSA-Cryptography uses algorithms, codes and keys to securely encrypt personal data without the interference of third parties or intruders such as hackers. An example of a cryptographic methodology is the creation of a new wallet that generates a public address and a private key.

Quantum security is seen as a major problem in the blockchain and crypto sector, and it is widely believed that powerful quantum computers will one day be advanced enough to break existing cryptography. This could lead to the theft of digital assets worth billions of dollars or the complete closure of blockchain technology. There are many projects dedicated to the development of quantum-resistant cryptography and blockchain.

Sarma is currently director of the Center for Condensed Matter Theory at the University of Maryland and put her ideas through the Technology Review earlier this week.

The physicist said he was “bothered by some of the quantum data noise I see these days” and liked the current state of technology as “a huge scientific achievement”. However, this leaves us “nowhere near having a quantum computer that can solve a problem that someone cares about.”

“It’s like trying to make the best smartphones today using vacuum tubes from the early 1900s.”
The physicist emphasized the elementary analysis that “a quantum computer can solve the difficult problem of finding prime numbers for large numbers faster than all classical forms,” ​​but crypto-hacking is currently beyond the reach of today’s computing power.

Sarma mentioned “qubits”, which are quantum objects such as an electron or a photon that provide advanced capabilities to a quantum computer:

Today’s most advanced quantum computers contain dozens of free (or “noisy”) physical qubits. Building a quantum computer capable of deciphering RSA codes from these components will require millions, if not billions, of qubits. ”
“Only tens of thousands of them will be used in calculations – the so-called logical qubits; the rest will be necessary to correct the error and compensate for the decoherence. ”

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While Sarma did not want to sound the alarm about cryptography, he noted that a real quantum computer “would have applications unthinkable today.” Similarly, no one could have foreseen that the first transistor, made in 1947, would lead to laptops and smartphones in this era.

“I continue to hope for hope and a strong belief in quantum computing as a potentially disruptive technology, but the claim that it will start generating millions of dollars in profits for real companies selling services or products in the near future is very confusing to me. ” he said,

Although the risk is elusive, many companies are already making efforts to improve quantum security. Last month, Cointelegraph reported that the American banking giant JPMorgan published research related to a blockchain network for the distribution of quantum keys that counter quantum data attacks.

Xx labs also launched a blockchain that claims to be a “quantum-resistant and privacy-focused blockchain ecosystem.”

Source: CoinTelegraph

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