Security News > 2023 > January > Fujitsu: Quantum computers no threat to encryption just yet

Research conducted by Fujitsu suggests there is no need to panic about quantum computers being able to decode encrypted data - this is unlikely to happen in the near future, it claims.

Fujitsu said it ran trials using its 39-qubit quantum simulator hardware to assess how difficult it would be for quantum computers to crack data encrypted with the RSA cipher, using a Shor's algorithm approach.

Researchers estimated it would require a fault-tolerant quantum computer with approximately 10,000 qubits and 2.23 trillion quantum gates in order to crack RSA, an achievement that the quantum industry is a long way from reaching.

Fujitsu said that although its research indicates the limitations of quantum computing technology preclude the possibility of it beating current encryption algorithms in the short term, the company will continue to evaluate the potential impact of increasingly powerful quantum systems on cryptography security.

"Our research demonstrates that quantum computing doesn't pose an immediate threat to existing cryptographic methods," Fujitsu Distinguished Engineer and Senior Director of Data & Security Research Dr Tetsuya Izu said in a statement, but added: "We cannot be complacent either."

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