Sarah Chen

Sarah Chen

Sarah Chen is a computer security researcher specializing in classical and modern cryptography education. She earned her Master's degree in Computer Science from MIT and has worked as a security analyst at major tech companies. Sarah is passionate about making cryptography accessible to beginners and has developed educational tools used by over 100,000 students worldwide.

1 articles
Pigpen Cipher History: From Ancient Secrets to Modern Puzzles

Pigpen Cipher History: From Ancient Secrets to Modern Puzzles

Explore the fascinating 500-year journey of the pigpen cipher, from medieval mysticism to Freemason rituals and Civil War secrets.

Cipher History15 min readDec 10, 2025