+296 points
Malfunctioning Beads
A secret message encoded in the Portable Game Notation (PGN) of a chess game on lichess.org. Positions on the board are converted to Base64 characters
+210 points
Happy Birthday
A crypto challenge where the goal was to create two strings, that when hashed, have the same 12 hex characters at the start. Use the Birthday Paradox to do this efficiently, with optimized code in Rust