Quantum computing advancements accelerate encryption threat timeline

Advancements in quantum computing hardware are accelerating the timeline for ‘Q-Day,’ the point at which quantum computers may be capable of breaking current encryption standards. Research suggests that a fault-tolerant quantum computer capable of running Shor’s algorithm to break RSA and elliptic-curve encryption may require only 10,000 to 26,000 qubits, a figure significantly lower than previous estimates of millions.

In response to this compressing timeline, Google LLC has set 2029 as its own deadline for migrating to post-quantum cryptography. This target precedes the National Security Agency’s 2031 goal and the National Institute of Standards and Technology’s 2035 guideline. The shift is driven by faster-than-expected progress in quantum hardware and error correction.

In the United States, the government is increasingly treating quantum technology as a matter of economic and national security. Through the CHIPS Act, companies like Rigetti have received $100 million in support, while other firms like PsiQuantum have secured massive funding. The race is now focused on whether post-quantum cryptography can be widely deployed before quantum machines reach the scale necessary to compromise the mathematical foundations of global digital security.