This image holds 6 ETH crypto puzzle for XIXOIO (website).
Bounty address. Still unsolved...

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Puzzle/Funding address: 1cryptoGeCRiTzVgxBQcKFFjSVydN1GW7

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| 26th October, 2018; 19:00 CET
| Two-weeks funding period is starting

From October 26th, a two-weeks funding period is starting for the upcoming puzzle from my original "Bitcoin Crypto Puzzle" series (see below).
Puzzle's address is ready to receive your support for both puzzle bounty and my work making it.
I have preloaded the address with my signature sum 0.00260417 BTC.

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| 2nd November, 2018
| Puzzle hardness reevaluation

In the middle of the funding period, the puzzle's complexity will be reconsidered according to the already collected sum.

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| 9th November, 2018; 19:00 CET
| Release of Bicoin Crypto Puzzle Level 5

On this day, the puzzle will be released publicly at 7 pm CET, but before that, I'll apply 23% creator's commision. In other words, a few hours before the puzzle release, I'll transfer 23% from the collected sum which is my fee for making a "battle-field" for all crypto puzzle solvers out there.
The rest (77%) will be left intact as the puzzle bounty and waiting for its winner!

Looking forward to making BTCrypto LVL 5 quite special!

* 23% creator's fee inclusive. (not applied due to low funding support)

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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.

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This image encodes private key for address 1cryptotnptVK1ZbpZFyEqcR5EVp5hjfk.

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

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This animation encodes private key for address 1cryptozWJAE7UzDZF1eSgsT7mVjUsu7g.

Solved in 22 hours (solver).

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hint tweet

Released at HCPP17 and solved in 3 months.

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

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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.

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High quality render. Originally launched on this website.

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

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. -------------------------------------------------------------------------

Level 3 solved in 38 hours. Look at Solver.

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

Level 2 solved after 29 hours. Look at Solver.

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