Will quantum computing make our current Cybersecurity encryption methods obsolete soon?

All answers to this question.

While a "cryptographically relevant" quantum computer is likely years away, the threat is real today because of the "Harvest Now, Decrypt Later" strategy. This is where attackers steal encrypted data now, hoping to decrypt it once quantum tech matures. The <Cybersecurity> community is already responding; NIST has selected several post-quantum algorithms like CRYSTALS-Kyber for standardization. Most enterprises should start by conducting a "cryptographic inventory" to identify where legacy RSA is used and plan for a transition to quantum-resistant signatures over the next few years.

   Answered 2025-01-05 by Cynthia Bennett

If we switch to post-quantum algorithms now, is there a risk that these new methods might have undiscovered vulnerabilities compared to the battle-tested RSA?

   Answered 2025-02-20 by Steven Foster

• That’s a valid concern, Steven. This is why the industry is moving toward "hybrid" approaches. We use both a traditional algorithm and a post-quantum one together. Even if the new one fails, you still have the protection of the classic encryption, giving us a safety net.

     Commented 2025-03-01 by Andrew Simmons

Don't panic yet. For most small businesses, the cost of quantum attacks is too high. This is currently a major concern for nation-states and high-finance.

   Answered 2025-03-15 by John Murphy

• True, John, but it’s better to be proactive. If you handle long-term sensitive data like medical records, quantum resistance should already be on your 5-year roadmap.

     Commented 2025-03-20 by Cynthia Bennett