2026 — The Turning Point for Quantum Computing
For decades, Quantum Computing has been seen as a technology of the future that is always “10 years away.” But in early 2026, IBM clearly stated that this is the year Quantum Computers will outperform Classical Computers for the first time in work with real business value, not just lab experiments.
With new processor generations delivering a dramatic increase in qubit counts, combined with major advances in error correction, Quantum Computers are beginning to solve problems that would take Classical Computers thousands of years.
What has changed from the past is this — it is no longer just about being “faster,” but about making the impossible possible.
What Quantum Advantage Means and Why It Matters
Quantum Advantage is the point at which a Quantum Computer can solve practical problems faster or more efficiently than the best supercomputers in the world today. The fields most directly affected include:
| Field |
Quantum Computing Potential |
| Materials Science |
Accurately simulate molecular structures at the atomic level — opening the door to lighter, stronger materials |
| Drug Discovery |
Reduce active compound discovery timelines from years to months — significantly cutting R&D costs |
| Financial Optimization |
Perform complex portfolio optimization and risk analysis in real time |
| Supply Chain |
Identify the best logistics routes from millions of combinations in a short time |
| Climate Modeling |
Simulate climate systems at a level of detail Classical Computers cannot achieve |
What to watch closely — IBM, Google, and Microsoft have all published clear roadmaps indicating that Quantum Computers will have enough logical qubits for production workloads by 2028–2030.
The Silent Threat: Harvest Now, Decrypt Later
But Quantum Advantage does not come with benefits alone. The most serious threat is already emerging — even if Quantum Computers are not yet ready to break encryption today.
This strategy is known as “Harvest Now, Decrypt Later” (HNDL):
- Harvest — Attackers intercept and collect encrypted data today from network traffic, cloud storage, and communication channels.
- Store — They keep that data securely and wait.
- Decrypt Later — Once Quantum Computers become powerful enough, they decrypt the accumulated data.
The data most at risk from HNDL includes:
- Military and intelligence secrets
- High-value business contracts and intellectual property
- Personal medical data
- Financial data and transactions
- Diplomatic communications
Data encrypted today does not mean data protected forever — this is the paradigm shift most organizations still do not fully recognize.
Gartner Warns: Today’s Asymmetric Cryptography Will Be Insecure by 2030
Gartner has issued a clear warning that the asymmetric cryptography widely used today — RSA, ECC, and Diffie-Hellman — will be insecure by 2030 once Quantum Computers become sufficiently capable.
The following will be affected:
- HTTPS/TLS — the encryption behind virtually all websites
- Digital Signatures — authentication and digital signing
- VPN — communication channels organizations trust as secure
- PKI Infrastructure — certificate systems that form the foundation of Internet security
- Blockchain — wallets and smart contracts that rely on elliptic curve cryptography
Gartner recommends that organizations begin planning their migration to Post-Quantum Cryptography now, because the transition process will take 5–10 years.
Post-Quantum Cryptography — The New Standard the World Is Moving Toward
NIST (National Institute of Standards and Technology) has already formally announced Post-Quantum Cryptography standards. The selected algorithms are designed to resist attacks from both Classical and Quantum Computers:
- ML-KEM (CRYSTALS-Kyber) — for key encapsulation / key exchange
- ML-DSA (CRYSTALS-Dilithium) — for digital signatures
- SLH-DSA (SPHINCS+) — for stateless hash-based digital signatures
Key timeline:
| Year |
Event |
| 2024 |
NIST formally announces PQC standards |
| 2025-2026 |
Cloud providers begin supporting PQC algorithms |
| 2027-2028 |
U.S. government agencies begin migration |
| 2030 |
Gartner expects RSA/ECC to be insecure |
| 2035 |
NSA requires all national security systems to use PQC |
The transition process is not just a matter of “updating a library.” It requires reviewing every system that uses cryptography — which, in a large enterprise, can mean thousands of touchpoints.
Impact by Industry
Financial Services
The financial sector is the primary target of HNDL attacks because transaction data and customer data are highly valuable:
- Banks must prepare to migrate payment gateways, internet banking systems, and ATM networks
- Securities firms must review trading platforms that rely on encrypted communications
- Insurance companies must assess quantum risk in actuarial model calculations
Healthcare
Medical data has a long shelf life — a patient’s genetic information remains sensitive for life:
- Hospitals must encrypt patient data using quantum-resistant standards
- Pharmaceutical companies must protect research backed by massive investment
- Health Tech firms must design new systems to be quantum-safe from the start
Government & Defense
Government agencies hold the most sensitive data of all:
- Intelligence data encrypted today may be decrypted within 5–10 years
- National ID systems that rely on digital signatures must prepare to migrate
- Diplomatic communications sent through encrypted channels may be subject to HNDL attacks
What Thailand Needs to Prepare
While the U.S., China, and the European Union are accelerating serious preparation in Quantum Security, Thailand is still in the early stages of awareness. This presents both risk and opportunity.
Thailand’s challenges:
- Most financial infrastructure still relies on RSA/ECC
- There is no formal national Quantum Security strategy yet
- There is a shortage of talent in Quantum Computing and Cryptography
- Most organizations have not yet started a cryptographic inventory
Thailand’s opportunities:
- Organizations that prepare early will gain significant competitive advantage
- Existing PDPA enforcement can provide a strong foundation for upgrading data protection
- Quantum Security readiness will strengthen credibility with foreign investors
- Thailand can position itself as an ASEAN Quantum-ready hub if it moves soon enough
Quantum Readiness Checklist for Organizations
Preparing for Quantum threats does not require buying a Quantum Computer. It starts with understanding the risk and planning systematically:
Phase 1 — Assess (start immediately)
- Conduct a full cryptographic inventory across the organization — identify which systems use RSA, ECC, or Diffie-Hellman
- Identify data with a long shelf life — information that must remain confidential for more than 10 years
- Assess supply chain risk — determine what level of cryptography vendors and partners use
Phase 2 — Plan (within 12 months)
- Conduct a quantum risk assessment for high-priority systems
- Create a migration roadmap to Post-Quantum Cryptography
- Train security teams to understand PQC standards and hybrid approaches
Phase 3 — Act (within 24–36 months)
- Begin piloting hybrid cryptography (Classical + PQC) in high-risk systems
- Update security policies to cover Quantum threats
- Test PQC compatibility with existing systems
Core principle: Do not wait until Quantum Computers can actually break encryption — data intercepted today cannot be recovered. Starting now is how you protect tomorrow’s data.
Sources:
The transition to Post-Quantum Security is complex and requires both deep expertise and real-world migration planning experience — it is not something organizations should handle alone without guidance from specialists.
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