Byte Sized Cryptology

Lessons

Essential ingredients of modern cryptography

Discover the magic of one-way cryptography using the Hundreds & Thousands biscuit analogy.

Learn how to share a secret key securely, using a top-secret recipe analogy.

Solve the key exchange problem with public and private keys using a cookie tin.

The one-way math behind the public lock: why multiplying primes is effortless, but factoring is astronomical.

Putting core cryptographic primitives to work in real-world trust systems

Solve the identity trust problem: Certificate Authorities, digital signatures, and how browsers verify authenticity.

Next-generation defences against quantum super-bakers

The quantum-safe transition: why classical keys crumble, the Harvest Now Decrypt Later threat, and finalised NIST standards.

Why current encryption is crumbling: Peter Shor's algorithm, modular wave period-finding, and the Interactive Threat Arena.