Quantum Cryptography

What Is Quantum Cryptography?

Quantum cryptography uses principles of quantum mechanics to secure communication, most notably through Quantum Key Distribution (QKD), which allows two parties to share an encryption key with a level of security guaranteed by physics rather than computational difficulty.

Why Quantum Computing Threatens Current Encryption

Many widely used encryption methods, such as RSA, rely on the difficulty of factoring large numbers - a problem that sufficiently powerful quantum computers are expected to solve far faster than classical computers, potentially breaking current encryption standards.

Quantum Key Distribution (QKD)

QKD leverages the behavior of quantum particles, where any attempt to intercept or measure the key in transit alters its state, allowing both parties to detect eavesdropping immediately.

Post-Quantum Cryptography

Alongside quantum cryptography, researchers are also developing post-quantum cryptographic algorithms - new mathematical approaches designed to run on classical computers while remaining secure against future quantum attacks.