Crypko: bridging blockchains and GANs https://crypko.ai

1. Bridging Blockchains & GANs

2. Blockchain --- The Distributed Ledger
Blockchain → Consensus protocol in the P2P
distributed ledger.
• Permits transactions to be gathered into blocks
and recorded
• Allows the resulting ledger to be accessed by
different servers
• Cryptographically chains blocks in chronological
order
Node A
Node B
Node CNode D
Node E

3. Ethereum & Smart Contracts
• Goal: Store any customized information on the blockchains
• Smart contracts:
• Concept introduced by Ethereum
• Execution of Smart Contracts stores predefined tokens
• Open and Decentralized applications are made possible!

4. Cryptokitties -- the first ERC721* game
*ERC721 Standard: crypto-collectable tokens on ETH blockchains Images are from https://www.cryptokitties.co

5. But Huston, we have problems
Cats composed of 8 hand-crafted parts → Low Diversity
Images are from https://www.cryptokitties.co

6. Problems in ERC721 games
→Genome mapping is discrete
→ Child can only get whole parts from
its parents
→ not a good hereditary system
Images are from https://www.cryptokitties.co

7. (Large) Problems in ERC721 games
• Genome determine parts individually
→ Kitty value depending on its parts,
not the kitty itself
• Rare genes easily controllable by game
developer
→ decentralization at risk
Images are from https://www.cryptokitties.co

8. Crypko: A GAN based ERC721 Game
Hand-crafted image
generation
GAN solves all above
issues
Crypko: https://crypko.ai

9. Crypko: A GAN based ERC721 Game
High resolution
generated images
Genome

10. Interpolation in Crypko space
Video link: https://youtu.be/AXAouosx95Y

11. Crypko: Encoding and Hereditary System
All images here are from MakeGirlsMoe public model.
A bionic mechanism
• Dominant genes and Recessive genes
in conditional variables
• Meiotic recombination and mutation
• 294 bits genome, affordable storage
on the blockchain
• Derivatives look smooth, compare to
their origins

12. Crypko
• GAN → High Quality and Diversity
• Hereditary system → Consistent
• Genome determines the Entirety
→ Pricing inferenced by subjective judgement
• GAN latent space not decomposable
→ Not controllable, better Decentralization

13. Yanghua Jin (Fudan University)
Huachun Zhu (Fudan University)
Jiakai Zhang (Carnegie Mellon University)
Yingtao Tian (Stony Brook University)
Minjun Li (Fudan University)
Chunqi Zhao (University of Tokyo)
Zhihao Fang (Carnegie Mellon University)
Crypko Beta on Rinkeby Testnet comes in May!