Puzzle 3

30th January

19:00 UTC

Built by:


Sometimes they spontaneously reorganize themselves into an orderly structure.

View the solution

Puzzle Preparation

To give you a better chance of solving this puzzle, we suggest that you look through some relevant background materials.

See puzzle details on Github

Puzzle link

Puzzle Hints

1. Note that the first component of the ciphertext is used as the signature public key

2. Consider attacking using the target group

3. Use a linear relation and pairings to cancel out the contribution of the randomness to the second component of the ciphertext

Puzzle Winners

gold 01


Puzzle completed



silver 02


Puzzle completed



bronze 03


Puzzle completed



You can see all of the scores for this puzzle in the spreadsheet here.

Puzzle Solutions and Write-ups

The winner of the puzzle write up was submitted by yannickseurin. You can view the solution and puzzle write up here. The background material required to solve the puzzle is also covered in the write up.
There were many interesting write-up submissions which are linked below:
* Write-up by yannickseurin
* Write-up by tjsharp1
* Write-up by niooss-ledger
* Write-up by danaiballa
* Write-up by sylvainpelissier
* Write-up by 10to4
* Write-up by TrapdoorHeader
* Write-up by notnotraju
* Write-up by huy-tn
* Write-up by brozorec
* Write-up by georgwiese
* Write-up by Scar26
* Write-up by thor314
* Write-up by kkstar0