Cryptography
Post-Quantum Cryptography
Also known as: PQC, Quantum-resistant cryptography
Definition
Classical cryptographic algorithms designed to remain secure against attacks by both classical and large-scale quantum computers.
Examples
- Chrome, Cloudflare, and AWS deploying hybrid X25519+ML-KEM-768 key exchange in TLS 1.3.
- OpenSSH using ML-KEM and Streamlined NTRU Prime hybrid key exchange for SSH connections.
Related terms
Quantum Cryptography
Cryptography that uses quantum-mechanical properties — typically of photons — to achieve security guarantees impossible with classical communication alone.
RSA Algorithm
A public-key algorithm by Rivest, Shamir and Adleman (1977) whose security rests on the difficulty of factoring the product of two large prime numbers.
Elliptic Curve Cryptography (ECC)
A family of public-key algorithms based on the algebraic structure of elliptic curves over finite fields, offering equivalent security to RSA with much smaller keys.
Digital Signature
A public-key cryptographic mechanism that proves the authenticity, integrity and non-repudiation of a message or document.
TLS (Transport Layer Security)
TLS (Transport Layer Security) — definition coming soon.
Diffie–Hellman Key Exchange
A public-key protocol that lets two parties derive a shared secret over an insecure channel without ever transmitting it, based on the difficulty of the discrete logarithm problem.