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Dive deep into blockchain

Dive deep into blockchain

Blockchain became very popular due to the cryptocurrencies boom in the last few years. It is an interesting technology choice, but with every advantage comes a challenge that needs to be thoroughly reviewed and addressed. Feedback: https://joind.in/talk/2fdb3 .

Tomasz Kowalczyk

March 09, 2018
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  1. voting medical records cloud storage financial transactions decentralized messaging property

    registry land sales insurance digital wallets smart contracts crowdfunding property ownership social networking P2P finances virtual countries asset trading
  2. A B C D HAB HCD R B Merkle path:

    R-HAB-HB HA HB HC HD
  3. $storage = new SqliteStorage('chain.sq3'); $signer = new OpenSslSigner('private.key', 'public.key'); $genesis

    = new GenesisBlock('fiat lux'); $state = new State(); $chain = new Hashchain($storage, $signer, $genesis, $state); $chain->createBlock(new CreateAccount('A', 'Alpha')); $chain->createBlock(new CreateAccountWithCredits('Z', 'Zulu', 1000)); $chain->createBlock(new SendCredits('Z', 'A', 100));
  4. // Not enough credits: Z sent 100 to A and

    has only 900! $chain->createBlock(new SendCredits('Z', 'A', 1000)); // Sender X does not exist! $chain->createBlock(new SendCredits('X', 'A', 1000)); // Account Zulu already exists! $chain->createBlock(new CreateAccount('Z', 'Zulu'));
  5. Slides https://speakerdeck.com/thunderer/dive-deep-into-blockchain Resources http://www.imponderablethings.com/2013/07/how-bitcoin-works-under-hood.html http://chimera.labs.oreilly.com/books/1234000001802/index.html (Mastering Bitcoin) https://www.coindesk.com/math-behind-bitcoin (EC) https://en.wikipedia.org/wiki/Four_Knights_Game

    (Chess) http://queue.acm.org/detail.cfm?id=3136559 (Bitcoin) https://blog.acolyer.org/2017/08/30/a-concurrent-perspective-on-smart-contracts (smart contracts) https://en.bitcoin.it/wiki/Secp256k1 (Bitcoin Elliptic Curve) Pictures (Creative Commons) https://www.flickr.com/photos/skyseeker/14404947216 (lightning) https://www.flickr.com/photos/atermath/3053484935 (stripes) https://www.flickr.com/photos/randnotizenorg/32110828536 (electronic) https://www.flickr.com/photos/23221002@N00/7204014842 (equations) https://www.flickr.com/photos/spookyamd/14184019077 (mountain) https://www.flickr.com/photos/s1ng0/5445857570 (trees) https://www.flickr.com/photos/95213174@N08/10329928973 (handshake) https://www.flickr.com/photos/wiertz/4563720850 (signature) https://www.flickr.com/photos/33279673@N03/5482493912 (chains)