The article is taken from Chinese scientists say they may be a step closer to a quantum code-breaking machine by ASiaOne

Chinese scientists say they could be a step closer to developing a code-breaking machine, thanks to a recent breakthrough in quantum memory technology.

A quantum computer can crack an encrypted message in hours, but it needs tens of millions of qubits — the quantum information carried by subatomic particles — to make the calculation.
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However, a team from the University of Science and Technology of China has unveiled a design for a new quantum computer that could break a code using considerably less qubits than it was previously thought were needed.

Chinese scientists say they may be a step closer to a quantum code-breaking machine by ASiaOne