Crypto Puzzles by Zden
 | Bitcoin Crypto Puzzle Level N.x |
If you wish to support making of my puzzles, consider using donation address below. Thank you.
 | XIXOIO ETH puzzle |
Unsolved for 1 year and then SOLVER released and bounty transfered in 8 minutes after publishing!
| Bicoin Crypto Puzzle Level 5 |
UNSOLVED for over 2 years!
| Codex Protocol Puzzle |
Hint #1 & Hint#2 released.
Solved in 20 days.
My blog post how the puzzle works.
| Bitcoin Demobit 2018 Special |
This image encodes private key for address 1cryptotnptVK1ZbpZFyEqcR5EVp5hjfk.
Hint #1 released.
Solved in 51 days (tweet by solver [removed user]) - tweet by me.
| Bicoin Crypto Puzzle Level XM17 |
Solved in 22 hours (solver).
 | HCPP17 Monero Cryptopuzzle |
Released at HCPP17 and solved in 3 months.
Read solution written by the winner (posted on removed twitter account).
| Bicoin Crypto Puzzle Level 4 |
Level 4 solved in 52 hours.
Solution article by the winner.
 | Litecoin SegWit Activation Puzzle |
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)!
 | Decred's Autonomy Puzzle |
High quality render. Originally launched on decred.org/autonomy_puzzle website (no longer online).
You can read about puzzle mechanics from these "blueprints".
| Decred's Janus puzzle |
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 Puzzle for 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 |
Level 3 solved in 38 hours.
Look at Solver.
| Bicoin Crypto Puzzle Level 2 |
Public address: 1cryptoTuax4qeedzVC35eYf4c16v4reJ
Level 2 solved after 29 hours.
Look at Solver.
| Bicoin Crypto Puzzle Level 1 |
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.
