The poster features notable figures in the history of cryptography, depicted in a stylized manner.

Here’s the breakdown of the likely individuals (from top left to bottom right). Learn and understand their contributions to Crypto:

1. Top Left (Man with long hair and ruffled collar): Blaise de Vigenère

2. Top Center (Man with short hair, serious expression): Alan Turing

3. Top Right (Man with slicked-back hair, side profile): William F. Friedman

4. Middle Left (Bald man with glasses): Herbert Yardley

5. Middle Right (Woman with wavy hair, glamorous look): Joan Clarke

6. Bottom Left (Man with large ruffled collar): Thomas Jefferson

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