Jim Sanborn’s inbox is flooded with amateur cryptographers who say they’ve cracked the code with chatbots like Grok 3. SIGN UP for Plaintext to read the whole thing, and tap Steven's unique insights ...

For 35 years, cryptographers have tried to crack the final hidden code in the imposing copper sculpture in the courtyard of the CIA’s Virginia headquarters.

Math puzzles have a special way of making even the sharpest minds stop and think. A new brain teaser going around online has been challenging people to figure out the pattern hidden in a series of ...