Codex Protocol Puzzle

This image encodes the private key for this address.

Hint #1 & Hint#2 released. Solved in 20 days.
My blog post how the puzzle works.


Bicoin Crypto Puzzle Demobit 2018 Special

This image encodes private key for address 1cryptotnptVK1ZbpZFyEqcR5EVp5hjfk.

Hint #1 released. Solved in 51 days (tweet by solver).


Bicoin Crypto Puzzle Level XM17

This animation encodes private key for address 1cryptozWJAE7UzDZF1eSgsT7mVjUsu7g.

Solved in 22 hours (solver).


HCPP17 Monero Cryptopuzzle

Reveal the XMR seed and gain the initial reward 13.37 XMR.

hint tweet

Released at HCPP17 and solved in 3 months.


Bicoin Crypto Puzzle Level 4
This image encodes private key for address 1cryptoRMRnj7Q9fgToxTRvejLnx3QRPq.

Level 4 solved in 52 hours. Solution article by the winner.


Litecoin SegWit Activation Puzzle

Find 256 bits of the Private Key in this image:
Convert to WIF and profit!

Public address: LartGjF6UjmvmF1JXBhFf5wtM9uZX7LzeS

Hints #1, #2 & #3 released.
Solved in 2 weeks. Encryption animation with algo & priv key.
Solver code + story by the winner(s)!

Raw puzzle design in public domain.


Data for Decred's Autonomy "wheels" Puzzle

High quality render. Originally launched on this website.

You can read about puzzle mechanics from these "blueprints".
(m2c) -------------------------------------------------------------------------

Decred's Janus puzzle

Originally launched on this website:
Find DCR wallet seed. This puzzle in SVG is hiding the seed:

(After a week of beeing unsolved)
Here is the hint to help out with solving.

Solved in 10 days and 6 hours. Look at tree encoding scheme. -------------------------------------------------------------------------

Bicoin Crypto Puzzle - DefCon 24 Special with Nethemba

As usual, following image encodes private key. Premium bounty provided by Nethemba and released at DefCon 24.

Public address is 1cryptoP5yMdKcz1bjzUqnbs3LsasVRX6

If you want to support my free art, now you can. Use voucher
and I'll receive fair cut from the deal.

Solved in 5 days and 3 hours. Here is the solver. -------------------------------------------------------------------------

Bicoin Crypto Puzzle Level 3
This image encodes private key for address 1cryptoJzomVVJUSys8Qv1gKPCXFoZy1U.

Level 3 solved in 38 hours. Look at Solver.

Bicoin Crypto Puzzle Level 2. Find private key in this image. Public address: 1cryptoTuax4qeedzVC35eYf4c16v4reJ

Level 2 solved after 29 hours. Look at Solver.


This is the first level of Bitcoin Crypto Puzzle.
The image encodes private key with the bounty for the first solver.
I consider this level as simple for the start.
So let's play the game, wipe it and let me create another one.
Public address for Level 1: 1cryptommoqPHVNHuxVQG3bzujnRJYB1D
Solutions will be posted here after accomplishing.

Level 1 solved after 6 hours. Look at Solver.


Litecoin Puzzle as T-shirt

Test run. Give me feedback of your satisfaction.


Next Bitcoin Puzzle Donut Address

Possibility to speed up bitcoin puzzles series with your donation.