What is post-quantum cryptography?

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The program is designed to give learners an in-depth understanding of qubits, quantum gates, superposition, entanglement, and quantum algorithms like Grover’s and Shor’s. In addition, students get hands-on exposure to quantum programming frameworks such as Qiskit, Cirq, and cloud-based simulators, ensuring real-time learning.

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The intersection of Quantum Computing and Artificial Intelligence (AI) is one of the most exciting areas in technology. AI deals with pattern recognition, optimization, and learning from large datasets, which often require enormous computational resources. Quantum computing, with its unique properties like superposition, entanglement, and quantum parallelism, offers the potential to dramatically accelerate and improve AI.

Why It’s Needed

• Current cryptographic systems like RSA, ECC (Elliptic Curve Cryptography), and Diffie–Hellman rely on mathematical problems (factoring large numbers, discrete logarithms) that are hard for classical computers but could be solved efficiently by quantum algorithms (like Shor’s algorithm).

• Once large-scale quantum computers become practical, these traditional methods could be broken in seconds, exposing sensitive data.

What PQC Does

• PQC algorithms are built on mathematical problems that are believed to be resistant to quantum attacks.

• They are designed to run on classical computers but remain secure even if quantum computers are available.

Main Approaches in PQC

1. Lattice-based cryptography → Uses problems like Learning With Errors (LWE). Considered one of the strongest candidates.

2. Code-based cryptography → Relies on error-correcting codes (e.g., McEliece).

3. Hash-based cryptography → Builds security entirely on hash functions.

4. Multivariate polynomial cryptography → Uses systems of multivariate equations over finite fields.

5. Isogeny-based cryptography → Relies on the difficulty of finding isogenies between elliptic curves.

Examples

• Kyber (lattice-based, key encapsulation)

• Dilithium (lattice-based, digital signatures)

• Rainbow (multivariate signatures)

• SPHINCS+ (hash-based signatures)

Current Status

• The U.S. National Institute of Standards and Technology (NIST) has been running a Post-Quantum Cryptography Standardization Project to select algorithms that will replace RSA and ECC in the future.

• In 2022, NIST announced finalists like CRYSTALS-Kyber and CRYSTALS-Dilithium, which are expected to become new global standards.

✅ In short: Post-quantum cryptography is about future-proofing security so that even powerful quantum computers cannot break encryption protecting our data, banking, communications, and national security.

Read More  :

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