Sinclair McKay

Sinclair McKay is the London-based literary critic for the Telegraph and the Spectator and is the author of The Secret Life of Codebreakers and Bletchley Park Brainteasers.

A red and white illustration of a man and a woman, both portrayed as code-making geniuses.

The Past

The 16th-century codebreaker who wrote secret messages on boiled eggs

Giambattista della Porta’s contributions to codebreaking changed the course of communication.