Summary
Citigroup’s Citi Institute has issued a stark report, “Quantum Threat: The Trillion-Dollar Security Race Is On,” warning that quantum computers are likely to break today’s public-key cryptography within the next decade. The report frames Q-Day as a potential shock with severe economic and geopolitical consequences, threatening the digital trust underpinning finance, government, and critical infrastructure. The message is clear: quantum risk has moved from labs to the boardroom.
The messenger matters. When a bank with Citi’s reach across Wall Street and cyber defense raises the alarm, the issue goes mainstream in institutional finance. For quantum security practitioners, this is a pivotal signal that executive attention and budget will follow.
On timing, Citi surveys expert forecasts and a public prediction market. Kalshi responses put the chance of a “useful” quantum computer at 8% by 2027, 39% by 2030, and just over 50% by 2035. In short, there is a coin-flip likelihood of Q-Day within about 10 years, with a meaningful possibility it arrives sooner, which argues for urgent preparation.
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See the original article at: https://postquantum.com/security-pqc/citi-quantum-threat-report/