20 Casos de Estudo Cadeias de Blocos e Contratos Inteligentes

“A distributed multiversion concurrency control that prevents conflicts occurring in multi-master replication”

1. ETHEREUM: THE DECENTRALIZED COMPUTER

Ethereum is a platform and a programming language that makes it possible for any developer to buildand publish next-generation decentralized applications.

Ethereum can be used to codify, decentralize, secure and trade just about anything: voting, domainnames, financial exchanges, crowdfunding, company governance, contracts and agreements of most

kind, intellectual property, and even smart property thanks to hardware integration. Ethereum borrows the concept of decentralized consensus that makes bitcoin so resilient, yet makes ittrivial to build on its foundation. To find out more about how Ethereum works, consult the whitepaper.

2. ERIS INDUSTRIES: MILLIONS OF B.. MARMOTS

Eris Industries empowers developers to embrace participatory software architecture via distributedcomputing and smart contract systems.

Eris products comprise the first platform that allows the full potential of blockchain based technologies to berealized in enterprise. By combining blockchains and systems of smart contracts, businesses can take anydata-driven human relationship and reduce it to code – guaranteeing accurate and consistent execution of

functions which hitherto required human discretion to manage.

3. FACTOM: DECENTRALIZED REGISTRIES

Factom is creating a protocol to make Bitcoin 2.0 applications run faster, cheaper, and with much less bloat. Building an application on top of the powerful Blockchain presents developers with a few core problems: 1)

The system wasn't built for real-time applications 2) The costs get prohibitive as transactions pass a fewthousand and 3) the blockchain wasn't built to handle the massive number of transactions that Bitcoin 2.0

Developers want to secure with the system. Factom is built to solve these problems.

4. STORJ: DECENTRALIZED STORAGE

Created in early 2014, Storj is an open source project that aims to offer a completely decentralized,secure, and efficient cloud storage service. With its two applications, MetaDisk and DriveShare,

Storj aims to revolutionize the traditional cloud storage industry.

5. LA'ZOOZ: DECENTRALIZED RIDE SHARING

La'Zooz is an open-source and decentralized collaborative transportation system, that usescryptocurrency technology in order to establish, coordinate and grow its community of users,

developers, and promoters alike. Smart transportation is all about better using the already-existing infrastructure and resources

instead of building new ones. At the heart of the La'Zooz vision lies Real-time ride sharing: peoplewith private cars can share their drive with others who ride in the same direction.

6. SYNEREO: DECENTRALIZED FACEBOOK

Synereo is a Distributed and Decentralized Social Network. Founded in 2014, Synereo is currently developing a fully decentralized online social network,

powered and enabled by its users. Synereo is encrypted, does not depend on a central server, governing body or even a replicated

blockchain, making it impossible to take down.

7. ORISI: DECENTRALIZED ORACLES

Orisi itself is a for-profit startup owned jointly by Tomasz, Kuba and Grzegorz. The business modelis yet to be discovered - we’ll probably provide paid-for oracle hosting services, or launch/invest insome smart contracts ourselves. Orisi and FastCast source code is released under The MIT License

(that is: open source, free to use).

8. BITSHARES: DECENTRALIZED DIGITAL ASSETS

The BitShares platform itself is run and maintained by the BitShares community – an openconsortium of individuals and organizations committed to providing universal access to the power

of smart contracts. Working together, this community has designed and developed the BitShares platform to include

numerous innovative features within the smart contract industry.

9. RIPPLE: DECENTRALIZED PAYMENTS

Named one of the 50 Smartest Companies by MIT Technology Review, Ripple is a 100+ personstartup backed by prominent investors, such as Google Ventures, Andreessen Horowitz, Lightspeed

Venture Partners and IDG Capital Partners. Ripple is an Internet protocol that interconnects the world’s financial systems to enable the real-

time, secure transfer of funds in any currency. As settlement infrastructure, Ripple transforms andenhances today’s financial systems. Ripple unlocks assets and provides access to payment systems

for everyone, empowering the world to move value like information moves today.

10. TWISTER: DECENTRALIZED P2P MICROBLOGGING

Twister is the fully decentralized P2P microblogging platform leveraging from the free softwareimplementations of Bitcoin and BitTorrent protocols.

Because twister is completely decentralized no one can censor you. No one can remove your posts. Youraccount cannot be blocked. Private communication (Direct Messages) are protected with end-to-end

encryption. Both content and metadata (the recipient address) are protected. The IP address you use toaccess twister is not recorded on any server. Your online presence is not announced.

11. OPEN BAZAAR: DECENTRALIZED E-COMMERCE

OpenBazaar is a different way to do online commerce. Instead of visiting a website, you downloadand install a program on your computer that directly connects you to other people looking to buy

and sell goods and services with you. This peer to peer network isn't controlled by any company ororganization - it's a community of people who want to engage in trade directly with each other.

12. GETGEMS: DECENTRALIZED MESSENGER

The primary goal of GetGems is to make it easy for millions of people to adopt bitcoin. GetGems has all ofWhatsApp/Telegram functionality, with additional features.

Every GetGems user automatically gets his own protected wallet.The username is an alias to the walletaddress, an innovation that allows users to easily send both bitcoin and gems to their friends by sending a

text message. GetGems is a social network based on attention economy, If someone wants your attention, he should pay

you. The blockchain is what enables the transfer of value.

13. NAMECOIN: DECENTRALIZED DNS

Namecoin is a decentralized open source information registration and transfer system based on theBitcoin cryptocurrency.

Namecoin was the first fork of Bitcoin and still is one of the most innovative altcoins. It was first toimplement merged mining and a decentralized DNS.

14. FILAMENT: DECENTRALIZED IoT (INTERNET OF THINGS)

Filament (previously known as Pinoccio) is the best tool on the market for industrial sensor datacollection, remote monitoring, and web-based control of the real world.

Even more importantly, Filament is building the first Decentralized IoT stack, so that any devicecan discover, connect, interact, and even transact, without any central authority required.

15. HAWK : PRIVACY PRESERVING SMART CONTRACTS

Existing blockchain-based cryptocurrencies such as Bitcoin and Ethereum store all financialtransactions in the clear on the blockchain. This compromises the privacy of financial transactions,

which is essential in numerous applications.

Hawk is a blockchain-based smart contract system that stores encrypted transactions on theblockchain, and relies on cryptography to retain the security of the cryptocurrency.

16. SOLARCOIN: P2P SOLAR ENERGY GENERATION

SolarCoin is an alternative digital currency that works like air-miles for Solar electricitygeneration. SolarCoin is claimed by individuals living in homes with Solar Energy panels on their

roof or large solar electricity farms.

17. AUGUR: DECENTRALIZED BETS (PREDICTION MARKETS)

Augur is a fully-decentralized, open-source prediction market platform, intended to revolutionizethe manner in which information consensus is collected and aggregated. For more information

check out Augur.net and read the Augur White Paper

18. D-CENT - TECHNOLOGIES FOR DIRECT DEMOCRACY

D-CENT (Decentralised Citizens ENgagement Technologies) is a Europe-wide project bringingtogether citizen-led organisations that have transformed democracy in the past years, and helping

them in developing the next generation of open source, distributed, and privacy-aware tools fordirect democracy and economic empowerment.

19. SIDECHAINS (BY BLOCKSTREAM)

Blockstream’s core area of innovation is sidechains, a technology focused on improving on the blockchain,the most powerful public utility for distributed trust systems. Sidechains are blockchains that areinteroperable with each other and with Bitcoin, avoiding liquidity shortages, market fluctuations,fragmentation, security breaches and outright fraud associated with alternative crypto-currencies.

20. PERSONA (BY CONSENSYS)

Ethereum blockchain production studio ConsenSys is developinga personalized web-based wallet andidentity management system, known as uPort .