Top 7 Companies in Post-Quantum Cryptography (PQC) that Leading the Charge
Post-Quantum Cryptography (PQC): An Overview
Post-Quantum Cryptography (PQC) refers to cryptographic algorithms that are designed to be secure against attacks from quantum computers. As quantum computing technology progresses, it poses a significant threat to traditional public-key cryptographic systems like RSA, ECC (Elliptic Curve Cryptography), and DSA (Digital Signature Algorithm), which rely on the hardness of problems such as integer factorization and discrete logarithms—problems that quantum algorithms like Shor’s algorithm can solve efficiently.
Types of Post-Quantum Cryptography (PQC) Algorithms
Post-quantum cryptographic algorithms fall into several categories, each based on different hard mathematical problems:
- Lattice-based cryptography
Relies on the hardness of lattice problems (e.g., Learning With Errors - LWE). Known for efficiency and strong security guarantees. - Code-based cryptography
Based on problems in decoding random linear codes. McEliece is a notable example. - Multivariate polynomial cryptography
Uses systems of multivariate quadratic equations over finite fields. Suitable for signatures. - Hash-based cryptography
Relies on the security of hash functions. Primarily used for digital signatures (e.g., XMSS, SPHINCS+). - Isogeny-based cryptography
Based on the difficulty of finding isogenies between elliptic curves. Offers smaller key sizes but often slower performance.
Top 7 Companies in Post-Quantum Cryptography (PQC)
- Palo Alto Networks
Headquarters: Santa Clara, California, United States
Founded: 2005
Palo Alto Networks, the global cybersecurity leader, continually delivers innovation to enable secure digital transformation—even as the pace of change is accelerating.
- Thales
Headquarters: La Défense, France
Founded: 7 December 2000
Thales S.A., trading as Thales Group is a French multinational aerospace and defence corporation specializing in electronics.
- IDEMIA
Headquarters: Courbevoie, France
Founded: 2007
IDEMIA is a French multinational technology company headquartered in Courbevoie, France. It provides identity-related security services, and sells facial recognition and other biometric identification products and software to private companies and governments.
- Entrust
Headquarters: Minneapolis, Minnesota, United States
Founded: 1994
Entrust Corp., formerly Entrust Datacard, provides software and hardware used to issue financial cards, e-passport production, user authentication for those looking to access secure networks or conduct financial transactions, trust certificated for websites, mobile credentials, and connected devices.
- ID Quantique
Headquarter: Geneva, Switzerland
Founded: 2001
ID Quantique is a global company with offices and engineering labs located around the world. Continuous passion, a strong focus on innovation and the flexibility and experience of a dedicated team have allowed IDQ to establish itself as a leader in the fields of quantum-safe cryptography, scientific instrumentation and random number generation.
- Post-Quantum Ltd.
Headquarter: London, England, United Kingdom
Founded: 2009
Post-Quantum protects the world’s information against today’s threats and tomorrow’s challenges. We ensure our clients can carry out their operations safely and securely, with trust and confidence in all their activities.
- PQShield
Headquarter: Oxford, United Kingdom
Founded: 2018
PQShield comprises a world-class collaboration of post-quantum cryptographers, engineers, and researchers. We’ve helped shape all of the first international PQC NIST standards, and we were the first cybersecurity company to develop quantum-safe cryptography on chips, in applications, and in the cloud.
For Additional List of Companies Browse Post Quantum Cryptography (PQC) Market Report
Current Status and Adoption
As of 2025, NIST has completed several rounds of its PQC standardization process. Algorithms such as CRYSTALS-Kyber (for encryption/key encapsulation) and CRYSTALS-Dilithium (for digital signatures) are among those selected for standardization. Organizations and governments are beginning to plan and implement transitions to these new systems.
Conclusion
Post-Quantum Cryptography is a proactive measure to secure digital systems against future threats posed by quantum computing. With the imminent arrival of practical quantum machines, PQC is becoming an essential area of research and implementation to ensure long-term cybersecurity.
