Big(data) in block(chains)
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This document provides an overview of Bitcoin and blockchain technology. It describes how Bitcoin was created in 2008, functioning as a transmission protocol, distributed ledger, and stored value account without the need for settlement. Transactions are recorded on a blockchain, with a new block added every 10 minutes. The blockchain records transaction hashes in blocks linked by cryptographic hashes. Analyzing Bitcoin transaction data can provide useful statistics about usage trends, price movements, and detect spam attacks.
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This document discusses the history and current state of Bitcoin and blockchain technology. It provides an overview of Bitcoin's origins with Satoshi Nakamoto's 2008 whitepaper, the genesis block from 2009 referencing the financial crisis, and prior related work. Benefits of Bitcoin include anonymity, transparency, security, and speed of value transfer. Use cases mentioned include escrow, smart contracts, issuing securities, and digital notaries. Challenges integrating with traditional finance are noted. The document concludes with background on the author's payments company in Romania.
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Bitcoin is a digital currency that uses blockchain technology to function as a decentralized peer-to-peer network without government control. It was created in 2009 by an anonymous founder known as Satoshi Nakamoto and uses cryptography and proof of work to validate transactions. Transactions are grouped into blocks and added to the blockchain through mining, where miners use computing power to solve cryptographic puzzles and are rewarded with new bitcoins. The blockchain serves to order and verify transactions through mathematical linking of blocks to prevent double spending. As more blocks are added, the blockchain record of transactions becomes more secure.
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How to Create AltCoin(Alternative Cryptocurrency)?
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China has just announced to accelerate the introduction of its digital money.
1) What is the bitcoin and what is blockchain?
2) Why China wants to accelerate the adoption of blockchain Technology?
3) Ant impact on the domination of USD in the world?
4) Any cooperation between China and Europe in this sector?
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This document discusses the history and current state of Bitcoin and blockchain technology. It provides an overview of Bitcoin's origins with Satoshi Nakamoto's 2008 whitepaper, the genesis block from 2009 referencing the financial crisis, and prior related work. Benefits of Bitcoin include anonymity, transparency, security, and speed of value transfer. Use cases mentioned include escrow, smart contracts, issuing securities, and digital notaries. Challenges integrating with traditional finance are noted. The document concludes with background on the author's payments company in Romania.
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China has just announced to accelerate the introduction of its digital money.
1) What is the bitcoin and what is blockchain?
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Explaining Bitcoin:
1. Why does Bitcoin exist?
- Removal of middlemen
- Censorship resistance
- Solving Double Spend Problem
- Privacy
2. What is Bitcoin?
- Hard money
- Not controlled by anyone, but math
- Decentralized (Permissionless, Censorship resistant)
- Counterfeit-resistant
- Scarcity (Store of Value)
- Divisibility
- Security (Cryptography)
3. How does Bitcoin work?
- Public transaction on a public ledger
- Validation by everyone
- Immutability provided by linked blocks on blockchain
4. How to Send and Receive Bitcoin?
- Wallets (Custodial, Mobile, Desktop, Hardware)
- Private keys (password), Recovery Seed
5. How to acquire Bitcoin?
- Peer-to-Peer, Over The Counter
- Bitcoin ATM
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6. Other cryptocurrencies
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http://www.vaughanpl.info/programs/view/2617
https://twitter.com/ThatCryptoTO
https://www.meetup.com/ThatCrypto/
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Since 2017 - Host of the weekly ThatCrypto Blockchain Meetup www.meetup.com/ThatCrypto (Watch recorded meetups at http://bit.ly/watchthatcrypto)
Since 2018 - Ambassador for Waves Blockchain
Content covered during presentation:
1.Why Bitcoin exist?
- Removal of middlemen
- Censorship resistance
- Solving Double Spend Problem
- Privacy
2.What is Bitcoin?
- Hard money
- Not controlled by anyone, but math
- Decentralized (Permissionless, Censorship resistant)
- Counterfeit-resistant
- Scarcity (Store of Value)
- Divisibility
- Security (Cryptography)
3.How does Bitcoin work?
- Public transaction on a public ledger
- Validation by everyone
- Immutability provided by linked blocks on blockchain
4.How to Send and Receive Bitcoin?
- Wallets (Custodial, Mobile, Desktop, Hardware)
- Private keys (password), Recovery Seed
5.How to acquire Bitcoin?
- Peer-to-Peer, Over The Counter
- Bitcoin ATM
- Exchanges
- Gift cards
6.Other cryptocurrencies
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Introduction to Bitcoin for programmers
Bitcoin is a decentralized peer-to-peer system that solves the problems of authenticity of money and preventing double spends of coins. It uses public and private keys, addresses that act like accounts, transactions to transfer coins between addresses, and mining to verify transactions and add them to the permanent public record called the blockchain. Miners are rewarded with new bitcoins and transaction fees for solving complex cryptographic puzzles to find valid blocks to add to the chain. Over time, the blockchain has grown to be a record of all valid bitcoin transactions since the genesis block was created in 2009.
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Bitcoin is a digital currency introduced in 2009 that allows for the assignment and transfer of ownership of digital goods without a central authority. It uses a blockchain, which is a distributed database of all transactions that grow in blocks and reference previous blocks, making it difficult to tamper with past records. The blockchain uses mining, where nodes validate transactions and create new blocks, to introduce new coins and process transactions in a decentralized manner.
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Bitcoin for programmers - part 1 version 2
1. The document provides an introduction to Bitcoin for programmers, covering key concepts such as wallets, addresses, transactions, blocks, and mining.
2. It explains how Bitcoin uses a decentralized peer-to-peer network and public transaction ledger (blockchain) to solve problems with authenticity and double spends of digital currency.
3. The talk gives an overview of Bitcoin's history and ecosystem, how transactions and wallets work, and security aspects like blockchain forks and the 51% attack.
Fork your mother if you want fork: A short history of Bitcoin scaling wars
The document summarizes the history of Bitcoin scaling debates and solutions from 2015 to 2017. It discusses proposals like Bitcoin XT, Bitcoin Unlimited, and Bitcoin Classic that aimed to increase the block size limit. It also covers the development and activation of Segregated Witness (Segwit) and disagreements between Bitcoin Core and Bitcoin Unlimited supporters. The document concludes by discussing the creation of Bitcoin Cash from a hard fork and predictions for Bitcoin's future adoption of technologies like the Lightning Network.
Registro de Informações no Blockchain da rede Bitcoin
The document discusses various ways that information can be stored on the Bitcoin blockchain, including:
1) Storing messages in the coinbase of mined blocks by including ASCII text in hexadecimal format.
2) Using OP_RETURN scripts to store data in a blockchain transaction to create multi-signature wallets or store files with hashes.
3) Storing messages by including them in the public address of a wallet up to 34 characters in length.
4) Archiving files on the blockchain by storing the file hash and name in hexadecimal format sent to dummy wallets.
Bitcoin & blockchain
Overview di mercato blockchain con Davide Menegaldo, Blockchain Education Network Italia ed Helperbit
An introduction to block chain technology
In this presentation there will be brief overview on what is Blockchain Technology?
What are the components in a block?
what are the applications of BlockChain technology?
Ethereum overview
An technical overview of Ethereum that provides a full picture starting from the original problem of building a distributed ledger and mining up to smart contracts.
Please note that there are no llamas in this presentation.
Developers Guide To Blockchain, Bitcoin and Cryptocurrencies
Learn the core concepts of cryptocurrency and its underlying Blockchain technology by implementing it in JavaScript.
You can get the course here : https://www.eduonix.com/developers-guide-to-blockchain-bitcoin-and-cryptocurrencies?coupon_code=slidess10
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This document discusses blockchain technology and its potential applications. It begins by introducing CryptoVarna, a group interested in blockchain technologies, cryptocurrencies, and ICOs. It then discusses VarnaLab, an independent hacker space. The document then provides a high-level overview of what blockchain is, including that it is a distributed, immutable, and secure data structure. It discusses the origins and early pioneers of blockchain technology before Satoshi Nakamoto. The document outlines several potential uses of blockchain technology, including cryptocurrency, distributed file storage, digital identity, voting, smart contracts, crowdfunding, and more. It concludes by mentioning some blockchain use cases from companies like IBM.
Bitcoin Explained: What Is Bitcoin, Why It Exists, How It Works
Video presentation: https://www.youtube.com/watch?v=plOucHW7EKU&list=PLpK0Ik21wblUz0bT0I5ebJdr36PxA5ZN4&index=4
Explaining Bitcoin:
1. Why does Bitcoin exist?
- Removal of middlemen
- Censorship resistance
- Solving Double Spend Problem
- Privacy
2. What is Bitcoin?
- Hard money
- Not controlled by anyone, but math
- Decentralized (Permissionless, Censorship resistant)
- Counterfeit-resistant
- Scarcity (Store of Value)
- Divisibility
- Security (Cryptography)
3. How does Bitcoin work?
- Public transaction on a public ledger
- Validation by everyone
- Immutability provided by linked blocks on blockchain
4. How to Send and Receive Bitcoin?
- Wallets (Custodial, Mobile, Desktop, Hardware)
- Private keys (password), Recovery Seed
5. How to acquire Bitcoin?
- Peer-to-Peer, Over The Counter
- Bitcoin ATM
- Exchanges
- Gift cards
6. Other cryptocurrencies
The Lightning Network - A gentle introduction
The Lightning Network allows for instant, low-cost payments on Bitcoin through the use of payment channels and a mesh network. It provides greatly improved scalability over Bitcoin by taking transactions off-chain, where local consensus between peers is sufficient instead of global consensus on the blockchain. While adding complexity, it enables new use cases like micropayments and improves privacy. Real-world examples demonstrate its viability for coffee shops, online purchases, tipping, and more.
Bitcoin explained. Talk at Vaughan Public Library
Talk by Denis Serebryakov at Vaughan Public Library on May 13, 2019
http://www.vaughanpl.info/programs/view/2617
https://twitter.com/ThatCryptoTO
https://www.meetup.com/ThatCrypto/
Denis Serebryakov is a Blockchain and Cryptocurrency Consultant.
Since 2017 - Host of the weekly ThatCrypto Blockchain Meetup www.meetup.com/ThatCrypto (Watch recorded meetups at http://bit.ly/watchthatcrypto)
Since 2018 - Ambassador for Waves Blockchain
Content covered during presentation:
1.Why Bitcoin exist?
- Removal of middlemen
- Censorship resistance
- Solving Double Spend Problem
- Privacy
2.What is Bitcoin?
- Hard money
- Not controlled by anyone, but math
- Decentralized (Permissionless, Censorship resistant)
- Counterfeit-resistant
- Scarcity (Store of Value)
- Divisibility
- Security (Cryptography)
3.How does Bitcoin work?
- Public transaction on a public ledger
- Validation by everyone
- Immutability provided by linked blocks on blockchain
4.How to Send and Receive Bitcoin?
- Wallets (Custodial, Mobile, Desktop, Hardware)
- Private keys (password), Recovery Seed
5.How to acquire Bitcoin?
- Peer-to-Peer, Over The Counter
- Bitcoin ATM
- Exchanges
- Gift cards
6.Other cryptocurrencies
Blockchain and Bitcoin
Blockchain has the potential to revolutionize financial and cyber security. It provides an incorruptible digital ledger that can record transactions of value in a way that is verifiable and accessible to anyone. Blockchain uses a distributed network of nodes that jointly manage a database without a central authority. Information on the blockchain is stored across this network through a linked chain of blocks secured by cryptography. The first blockchain was developed for the cryptocurrency Bitcoin in 2009. Blockchain offers benefits like speed, low costs, decentralization, secure payments, and transparency. It could enhance concepts like globalism, security, and democracy through applications on a transparent, secure global platform.
Bit coin fiat_barcampbangalore BCB11 Feb 2011
Bitcoin is a digital currency powered by a peer-to-peer network used for internet transactions. It features anonymity like cash without central control or inflation. Bitcoins are transferred between addresses by generating digital signatures to link transactions in a publicly distributed blockchain database. Miners generate blocks to record transactions and are awarded new bitcoins as compensation. The identity of Bitcoin's creator, Satoshi Nakamoto, remains unknown.
Introduction to Blockchain and Ethereum
Slides from my presentation at the Thessaloniki Bitcoin & Blockchain meetup where I introduced Ethereum.
The Bitcoin Lightning Network
The Lightning Network aims to solve Bitcoin's problems of slow payments, high transaction costs, and poor scalability. It allows for instant, very low-cost payments between nodes by conducting transactions off-blockchain through payment channels. There are currently three main implementations of Lightning that have achieved compatibility. The network functions as a layer on top of Bitcoin through defined BOLT protocols, forming a decentralized network of payment channels between nodes.
BITCOIN: CMGB 6102 Management Information System
Bitcoin is the first cryptocurrency, running on blockchain technology and controlled by a decentralized network of users. Transactions occur via digital wallets and public ledgers rather than through banks. Users can obtain bitcoins through mining, where computers solve complex algorithms to validate transactions and receive new coins. While bitcoin offers anonymity and lack of fees, it also faces risks like volatility, acceptance issues, and potential for hacking and illegal use. Other cryptocurrencies have since emerged like Litecoin, Ethereum, ZCash and Dash.
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- The blockchain, which stores a linked list of validated blocks
- The minimal state, which is enough information to validate transactions
- The memory pool, which stores unconfirmed transactions
- The vault, which stores node-specific information like wallet transactions
It explains that the blockchain and minimal state must be eventually consistent across honest nodes to ensure the same transaction history. Transactions are applied deterministically to update the minimal state. Blocks may require rollbacks if invalid. Laws and testing are important to maintain consistency as the node view changes with new
BCHGraz - Meetup #8 - Intro & Ethereum
This time the main talk was about Ethereum (tech and differences to Bitcoin) and a short demo of recently released DApps.
Bitcoin p2p money
Bitcoin is a decentralized digital currency that can be transferred between nodes on its peer-to-peer network. Transactions are broadcast and verified within 10-60 minutes, and are irreversible. There is a hard limit of 21 million bitcoins, which are divisible into smaller units. Bitcoins can be obtained by mining, which involves using computing power to solve cryptographic problems, or purchased on online exchanges.
Blockchain for Beginners
Blockchains are distributed ledgers that use consensus protocols to track ownership or transactions across copies of the ledger maintained by members. A blockchain uses a consensus protocol like proof-of-work to agree on changes and additions to the distributed ledger. Membership in blockchains can be open to anyone, like in Bitcoin, or restricted to a fixed group. While blockchains provide advantages like distributed trust, achieving scalability is challenging due to the need for consensus among all members on every change.
Intro to Blockchain Slides
Talk for CodeMash 2018. Page to end for resources. Some more links (click to expand):
Bitcoin's Insane Energy Consumption Explained: https://arstechnica.com/tech-policy/2017/12/bitcoins-insane-energy-consumption-explained/
The Ethereum-blockchain size will not exceed 1TB anytime soon.
https://dev.to/5chdn/the-ethereum-blockchain-size-will-not-exceed-1tb-anytime-soon-58a
For use rights, please see license agreement below.
Fundamentals of Blockchain Technology
Learn the fundamentals of blockchain technology and the properties of a blockchain that make it ideal for securing information including financial transactions. We also go into some details of the operation of the Bitcoin protocol as the first real-world example of a successful implementation of blockchain principles. You will come away with an excellent foundation for understanding any Proof of Work based blockchain and an ability to independently evaluate any new blockchain based technology.
Introduction into blockchains and cryptocurrencies
Slides from my intro course:
- mapping the digital asset ecosystem (as of August 2019)
- how bitcoin works - step-by-step primer?
- hashrate, dollar value transferred, transaction rate and other metrics (as of August 2019)
- hard money, uncorrelated asset and other use cases
- proof-of-stake and proof-of-identity
- horizontal and vertical scaling
- how ethereum smart contracts work?
- ERC20 token standard
- boom and bust of the ICO market (as of August 2019)
- intro into #DeFI (as of August 2019)
- stablecoins
- MarkerDAO, Compound, Uniswap and other cool decentralized finance protocols
- Cryptokitties, Storj, Peepeth and examples of non-financial dapps
Blockchan For Developers
This document summarizes a talk on blockchain technology for developers. It discusses key concepts like digital signatures, cryptographic hash functions, Merkle trees, distributed consensus, and different failure models. It then covers the use of blockchains for applications like e-cash and titles. Specific blockchain protocols like Bitcoin and Ethereum are examined, looking at transactions, scripting, and addressing schemes. Scalability, off-chain solutions, and alternative consensus mechanisms are also addressed. The talk concludes with advice around building on existing frameworks rather than designing one's own crypto or blockchain from scratch.
About Bitcoin, Blockchain, and the DLT Chimera
The document provides an overview of Bitcoin, blockchain technology, and distributed ledgers. It discusses Bitcoin's origins and resilience despite challenges like crackdowns in China and the Mt. Gox exchange bankruptcy. The document also summarizes how the blockchain works through a process of mining and distributed consensus to record transactions without a centralized authority. Finally, it explores the potential for blockchain technology beyond Bitcoin and comparisons of Bitcoin to digital gold in the evolution of currency.
Bitclamp - A Permanent and Anonymous Publishing Platform Over Bitcoin
This presentation introduces Bitclamp, a new open-source project that uses the Bitcoin blockchain to permanently and anonymously publish files.
Bitcoin - Beyond the basics
An overview of the Bitcoin protocol, source code, data structures and algorithms. This presentation was delivered at Nova Southeastern University on June 20, 2014 by Chris DeRose of bitcoinfl.org
Bitcoins: Application of blockchain technology
Shiv Sahni provides a concise summary of the origins and technical workings of Bitcoin:
- Bitcoin was first conceived in 2007 and the domain bitcoin.org was registered in 2008 by its anonymous creator, Satoshi Nakamoto. The first Bitcoin block, known as the genesis block, was mined on January 3, 2009.
- Bitcoins are recorded on a public ledger called the blockchain. Transactions are grouped into blocks that are linked through cryptography. Miners use specialized hardware to validate transactions and are rewarded with new bitcoins.
- Keys and digital signatures ensure security - users have private keys that sign transactions to prove ownership, while public keys can receive bitcoins. Addresses are generated from public keys through has
Intro to blockchain
This document provides an introduction to blockchain technology. It discusses the history of blockchain, beginning with Satoshi Nakamoto's 2008 white paper introducing bitcoin and the release of the Bitcoin software in 2009. It then defines blockchain as a distributed ledger that can record transactions efficiently and permanently. Examples of blockchain use cases include voting systems, supply chain management, crowdfunding, and collectible games. The document also outlines the key components of a blockchain framework, including transactions, wallets, signatures, consensus mechanisms, hashing, blocks, and the blockchain data structure.
Crypto Fundamentals - Bitcoin, Altcoins, Forks, Blockchain
Video presentation https://www.youtube.com/watch?v=om7PsL5c0q8
What is nature and the history of Bitcoin, altcoins, forks and how blockchain fits into the picture?
This presentation is a good start for the beginners and, even more so, for the people familiar with the space since a lot of the concepts are misunderstood and often misguide people in their judgment.
Agenda:
- What is Bitcoin
- Why Bitcoin was created
- Immaculate conception of Bitcoin
- Decentralization (Scalability vs. Trustlessness)
- Bitcoin's proposition (open, borderless, neutral, censorship-resistant, public)
- Cryptography and Blockchain
- Proof-of-Work, Proof-of-Stake, and other consensus protocols
- Altcoins and Forks (their role and impact)
The Bitcoin blockchain (en)
Blockchain and cryptocurrencies like Bitcoin enable new forms of digital money and financial contracts. Bitcoin introduced a trustless digital currency using cryptography to secure a distributed public ledger called the blockchain. Miners on the Bitcoin network process transactions and add them to blocks which get added to the immutable blockchain roughly every 10 minutes. Over time, the blockchain has grown large as a record of all transactions, posing scalability challenges. New applications like smart contracts and alternative currencies like Namecoin build on this innovation to enable decentralized applications and services.
The Emergent Layer 2
The document discusses the concept of "Layer 2" scaling solutions for Bitcoin. It provides background on how Bitcoin has changed since its inception, including the emergence of block explorers and mining pools. It then defines Layer 2 as building additional services on top of Bitcoin to improve scalability and usability, without requiring changes to the Bitcoin protocol. Examples of Layer 2 solutions mentioned include simplified payment verification and various block explorer APIs that lightweight wallets can use to access blockchain data without running a full node. The document argues that Layer 2 does not reduce security or decentralization and allows Bitcoin to scale in a way that is transparent to users.
Blockchain with scala
This document provides an overview of blockchain and Bitcoin concepts, and how they can be implemented and extended using Scala. It begins by discussing different perspectives on what blockchain is and its significance. It then dives into Bitcoin, explaining its use of cryptography, immutable data structures, and proof-of-work to encode decentralized trust. The document discusses Bitcoin's transaction and UTXO data model. It also introduces the Scorex framework for building blockchains in Scala and shows how it implements and generalizes Bitcoin concepts. Finally, it briefly mentions some other Scala-based cryptocurrency and blockchain projects.
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Introduction into blockchains and cryptocurrencies
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More from Felix Crisan
Big data uservices
This document discusses trends in computing and data architectures. It notes that hardware is becoming more virtualized through containers and functions, bringing code closer to storage. Meanwhile, data structures are becoming more distributed through databases, distributed databases, and distributed ledgers. Computing scopes are decreasing while storage scopes are increasing. This is because data is inert but code can be more tightly controlled at smaller scopes. The document also discusses challenges of integrating microservices with data, including consistency, and notes the importance of people and processes ("metadata") alongside technology.
Bitcoin:Next
What are the next changes that we might see in the near future coming to Bitcoin? Improvement in the signature algorithms and scripts leading to better privacy and size optimizations
BigData in BlockChains
Blockchains provide a fertile ground for storing and managing big data in a decentralized manner. Some examples of using blockchains for big data include Numer.ai for storing machine learning data shapes, IPFS and FileCoin for distributed storage, and BigchainDB as a distributed database with blockchain characteristics. Blockchains allow users to store and control their own data while granting view rights to interested and trusted parties, making it even GDPR compliant by keeping users as the data controllers.
Lightning Network
The document discusses the Lightning Network, which aims to scale bitcoin transactions by enabling instant, low-cost payments through off-chain payment channels. It describes key concepts like payment channels, routing payments across multiple nodes, and implementations. The Lightning Network allows for near-instant micropayments, smart contracts, and cross-chain atomic swaps by using timelocks and hashed timelock contracts to securely transfer bitcoin off the main blockchain.
Smart contracts using web3.js
Smart contracts can be deployed and executed on the Ethereum blockchain using web3.js. Web3.js is a JavaScript API that allows interaction with Ethereum clients like Geth to deploy contracts, call contract functions, and get information from the blockchain. Contracts are written in languages like Solidity and deployed through transactions that store the compiled code at an address. Once deployed, the contract code and data resides on the blockchain and can be interacted with through web3.js by calling functions or accessing public variables.
Smart contracts in Solidity
Smart contracts are computer protocols that facilitate, verify, or enforce the negotiation or performance of a contract. On Ethereum, a smart contract is code and data that resides at a specific address on the blockchain. The Ethereum Virtual Machine is the runtime for smart contracts, which can call other contracts, have storage to store data, and can remove themselves from the blockchain. Smart contracts are defined through transactions and deployed to the blockchain, then users can interact with them through their ABI interface. Developers use languages like Solidity to code smart contracts and tools like Truffle to test contracts locally before deployment.
Mashing the data
A proposal for replicating relational databases to non-relational ones. We choose Google Cloud Datastore, but could as well use MongoDB
Enablers for o commerce
oCommerce is omniCommerce. If we talk about omni channel why do we keep talking about mCommerce and eCommerce?
mcommad
MCOMMAD discusses blending advertising and mobile commerce (m-commerce). It provides an overview of NETOPIA, the largest SMS aggregator and payment gateway in Romania, and their mobilPay mobile wallet. The document notes that while mobile advertising currently makes up around 5% of global ad spend, mobile purchases account for 35-40% of all purchases. It introduces the mobilPay wallet as not just a payment tool but a marketing platform, allowing clear tracking of transactions resulting from marketing actions. Features mentioned include Push2Pay notifications, offline in-store functionality, and QR/BLE/NFC codes to enable online and offline interactions.
NoSQL solutions
MongoDB and Redis are popular NoSQL alternatives to SQL databases. MongoDB is a document-oriented database that does not require a predefined schema and allows embedding documents. It supports features like sharding, replication, and indexing. Redis is an in-memory key-value store that persists data to disk. It supports data structures like strings, hashes, lists and sets. Both databases are commonly used for caching, queues, and other use cases where flexibility and performance are important.
Deconstructing Lambda architectures
The document discusses the lambda architecture, which is designed to handle large volumes of data and queries over that data. It describes the three main layers - batch, speed, and serving layers - that make up the lambda architecture. The batch layer handles batch processing and generates a master dataset. The speed layer handles real-time queries and compensates for latency in the batch layer. The serving layer indexes and exposes views of the data to support ad-hoc queries.
Presentation for the first Bucharest Big data meetup
RT Analytics provides real-time analytics and insights for their mobile payment and SMS aggregation businesses in Romania. They use a data streaming platform with Storm for scalable stream processing, RabbitMQ for queuing transaction data, and Redis for fast in-memory storage. This allows them to aggregate transaction details in real-time by merchant, status, error, currency and time interval. The setup provides operational insights, transaction monitoring, and business dashboards to gain better understanding of queries, insights, and predictions to improve their services.
Data analysis with Pandas and Spark
This document discusses using Jupyter notebooks, Pandas, and Spark for analytics pipelines on both small and large datasets. It summarizes the challenges of working with different data volumes and timeframes. For small mobile transaction data, notebooks with Pandas and R are used, while larger retail data is analyzed with Spark ML and scikit-learn in notebooks running in Docker containers. Future work includes applying Spark to additional domains and building forecasting and streaming capabilities.
TCP/IP of money
This document discusses the history and potential of blockchain technology. It traces the origins of TCP/IP and Bitcoin, comparing Bitcoin to TCP/IP for the internet. Blockchain is described as a transmission protocol, distributed ledger, and stored value account. The document outlines increasing corporate investment and experimentation in blockchain applications across banking, exchanges, infrastructure, and other areas. It argues that blockchain will fundamentally change the financial industry in the same way TCP/IP transformed communication, and that "blockchain is the TCP/IP of money."
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Presentation for the first Bucharest Big data meetup
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みなさんこんにちはこれ何文字まで入るの？40文字以下不可とか本当に意味わからないけどこれ限界文字数書いてないからマジでやばい文字数いけるんじゃないの？えこ...
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みなさんこんにちはこれ何文字まで入るの？40文字以下不可とか本当に意味わからないけどこれ限界文字数書いてないからマジでやばい文字数いけるんじゃないの？えこ...
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Big(data) in block(chains)
- 1. (Big) Data in (Block) Chains Felix Crisan, BTKO.in
- 2. whoami
- 3. Bitcoin 101
- 4. Bitcoin genesys ● Initial paper published on 31-Oct-2008 ● First block mined on 3-Jan-2009 (“Chancellor on brink of second bailout for banks”) ● Based on previous work (b-money / Wei Dai, bit gold / Nick Szabo, Hashcash / Adam Back) ● Created by an “entity” called Satoshi Nakamoto ● Relies 100% on hashes/PKI/ECC
- 5. Bitcoin is ● Transmission protocol ● Distributed ledger (and consensus protocol) ● Stored Value Account (i.e. no settlement needed) ● Currency
- 6. Anatomy of a Bitcoin transaction ● Version ● # of inputs + List of inputs (Unspent Transaction Outputs - UTXOs) ● # of outputs + List of outputs ● Lock time ● Spending script All these are reduced to a hash that uniquely identifies a transaction
- 7. Blockchain ● New block every 10 minutes (avg) ● Block consists of ○ Hash of previous block ○ Merkle-tree of transactions ○ Difficulty ○ Nonce ○ List of transaction hashes
- 8. Why is it important? ● Pseudonimity (any and all transactions are public) - see e. g. http://btc.blockr.io/ ● Current (TS: 1445763930) stats ○ 89,296,250 TXs ○ 235,287,897 TX Inputs ○ 268,019,907 TX Outs ○ 101,372,490 Unique addresses ○ 14,761,525 Coins in circulation
- 10. Setup
- 11. Why? ● Confidence intervals (zeroconf/double spend detection) ● Compliance ● Trends ○ Detect Spam Attacks - adjust TX Fees ○ Predict movement in price - buy or sell BTC
- 12. Correlation
- 13. Stats Dust (Spam) Attacks BTC passes 1000$ Transactions per day Bitstamp Heist
- 14. Stats (2) USD Volume (# BTC x Average price) per day BTC passes 1000$ Pre MtGox insolvency
- 15. Stats (3) Transactions per Block This proves that the miners are “fair”
- 16. Stats(4) USD Volume vs #TX
- 18. Trivia (Current BTC price - 285.10 USD) ● Highest UTXO - 44,430,501 USD (5d6787b87be7cd240dc4de5e7e5fc048670618bec310 22a5b8c04bcc45f9952c) ● Highest Fee - 57020 USD (4ed20e0768124bc67dc684d57941be1482ccdaa45dad b64be12afba8c8554537) ● Highest Balance - 46,209,810 USD (3A1KUd5H4hBEHk4bZB4C3hGgvuXuVX7p7t)