A new YouTube video shows two presentations given by Bernard Fabrot and Simon Pfeffers about how they solved LCS35. Another video shows the opening of the time capsule at the same event.

Now that the LCS35 time-lock puzzle has been solved, cryptographer Ron Rivest has published a new challenge of the same kind. This time, he estimates that it’s going to take 15 years to find the solution.

In 1999 cryptographer Ron Rivest published an encrypted text that was designed to take 35 years to break. Apparently, it has now been solved.

In 1999 cryptographer Ron Rivest published an encrypted text that was designed to take 35 years to break. 18 years later it is still unbroken.