Information theory

A team of physicists has entangled three photons over a considerable distance, which could lead to more powerful quantum cryptography.

Harry Halpin wants our internet conversations to be more private. He’s helped create a new kind of network that might make it possible.

A simple geometric idea has been used to power advances in information theory, cryptography and even blockchain technology.

What’s a message, really? Claude Shannon recognized that the elemental ingredient is surprise.

Mark Braverman has spent his career translating thorny problems into the language of information complexity.

A bit of information theory can help you analyze — and improve — your Wordle game.

Vijay Balasubramanian investigates whether the fabric of the universe might be built from information, and what it means that physicists can even ask such a question.

A new result shows that quantum information can theoretically be protected from errors just as well as classical information can.

By carefully constructing a multidimensional and well-connected graph, a team of researchers has finally created a long-sought locally testable code that can immediately betray whether it’s been corrupted.