Bitcoin is a cryptocurrency and digital payment system invented by Satoshi Nakamoto that allows for peer-to-peer transactions without an intermediary. Transactions are verified by network nodes and recorded on the blockchain, which is an ordered, back-linked list of transaction blocks. The blockchain uses a Merkle tree to efficiently summarize transactions in each block with a digital fingerprint. Bitcoin addresses are generated from a public key hash derived through elliptic curve cryptography from a private key. Hierarchical deterministic wallets allow private keys to be deterministically derived from a seed to back up and restore wallets. Transactions consist of inputs spending outputs from previous transactions and new outputs sending coins to addresses, with scripts defining spending conditions.
RSK is a smart contract platform built on top of the Bitcoin blockchain that allows for faster transactions, better scalability, and Turing complete smart contracts. BTC can be transferred to the RSK blockchain to become "rootcoins" (RTC) to pay transaction fees, and RTC can be transferred back to BTC. RSK uses merged mining and a federated consensus model to provide security while allowing Bitcoin miners to participate. This expands the functionality of Bitcoin and strengthens its network security through broader participation of miners.
If you are new to Blockchain, this intro will guide you through the main concepts, use cases and technologies behind it. Blockchain is a revolution that goes beyond Bitcoins. It will involve the relationships between normal people and governments or established power, other than the way most of the the applications we use today works.
Consider this an effective Blockchain guide for newcomers. These slides have been developed and used in an Open Lesson at the Geeks Academy.
This document provides an overview of cryptocurrencies and Bitcoin. It defines cryptocurrency and describes how Bitcoin works as a decentralized digital currency using cryptography to regulate currency generation and verify fund transfers without a central bank. Key aspects covered include currency vs Bitcoin, Bitcoin expansion, cryptography basics like hashing and digital signatures, blockchain data structures, mining and proof-of-work consensus, and incentives to maintain the Bitcoin network.
Bitcoin is a cryptocurrency and digital payment system invented by Satoshi Nakamoto that allows for peer-to-peer transactions without an intermediary. Transactions are verified by network nodes and recorded on the blockchain, which is an ordered, back-linked list of transaction blocks. The blockchain uses a Merkle tree to efficiently summarize transactions in each block with a digital fingerprint. Bitcoin addresses are generated from a public key hash derived through elliptic curve cryptography from a private key. Hierarchical deterministic wallets allow private keys to be deterministically derived from a seed to back up and restore wallets. Transactions consist of inputs spending outputs from previous transactions and new outputs sending coins to addresses, with scripts defining spending conditions.
RSK is a smart contract platform built on top of the Bitcoin blockchain that allows for faster transactions, better scalability, and Turing complete smart contracts. BTC can be transferred to the RSK blockchain to become "rootcoins" (RTC) to pay transaction fees, and RTC can be transferred back to BTC. RSK uses merged mining and a federated consensus model to provide security while allowing Bitcoin miners to participate. This expands the functionality of Bitcoin and strengthens its network security through broader participation of miners.
If you are new to Blockchain, this intro will guide you through the main concepts, use cases and technologies behind it. Blockchain is a revolution that goes beyond Bitcoins. It will involve the relationships between normal people and governments or established power, other than the way most of the the applications we use today works.
Consider this an effective Blockchain guide for newcomers. These slides have been developed and used in an Open Lesson at the Geeks Academy.
This document provides an overview of cryptocurrencies and Bitcoin. It defines cryptocurrency and describes how Bitcoin works as a decentralized digital currency using cryptography to regulate currency generation and verify fund transfers without a central bank. Key aspects covered include currency vs Bitcoin, Bitcoin expansion, cryptography basics like hashing and digital signatures, blockchain data structures, mining and proof-of-work consensus, and incentives to maintain the Bitcoin network.
Boolberry improves on existing CryptoNote coins by calculating transaction IDs using only the transaction prefix, excluding ring signatures. This allows ring signatures to be cut off from old transactions, reducing block chain bloat by 55-90% compared to ordinary CryptoNote coins while still proving transactions belong to blocks. Boolberry is designed to be more efficient and provide a more compact, faster synchronizing block chain for a better user experience.
A brief introduction to Blockchain and the underlying technology of distributed computing, challenges and future scope.
Copyrights belong to the respective owners, intention is purely for informational/educational purpose
I would like to thank various blogs, technical tutorials, books, videos to help me understand the basics and collate this presentaion
During this presentation, we will cover a brief introduction into Blockchain technology, historic use cases & emerging trends for Blockchain technology. We will also touch on what to expect from Blockchain technology in 2019. It is important to understand the progress that is being achieved every day with every single step we take towards real use cases for Blockchain projects. 2019 might be the first year where the Blockchain starts to become a central part in people’s lives and in some industries.
Main points covered:
• Conduct a brief introduction to Blockchain technology;
• Discuss both historic use cases and emerging trends for Blockchain technology;
• What to expect from Blockchain technology in 2019
Presenter:
Our presenter for this webinar is Kenneth Kimbel, a Cybersecurity professional with over five years of overall experience providing diverse technology services in client-facing roles. Recent Master’s in Cybersecurity Risk Management as well as a JD with a Cybersecurity Law focus. Currently, Kenneth is a data privacy and Cybersecurity Advisory Consultant with Deloitte. He is also knowledgeable on both current technical and legal issues in security.
Date: March 27th, 2019
Recorded webinar: https://youtu.be/fLjVgj6MAPY
The presentation consists of various methodologies of cryptography and types of cryptocurrencies. The slides include information about how data mining is done for creating new Bitcoins. Also, how do transactions occur; Advantages and disadvantages of Bitcoins; Future Growth of Bitcoins.
Blockchain: The New Technology of TrustMarco Segato
An introductory presentation of the technology that is said to change the world, the result of practical research and participation in the Permanent Observatory of the Polytechnic University of Milan.
The document provides an overview of blockchain technology, including its key components and how it works. In 3 sentences:
Blockchain is a distributed ledger of transactions stored in encrypted blocks that are chained together, with each new block recording transactions and a hash of the previous block. The blockchain is maintained through a consensus mechanism where participants validate transactions and add new blocks to the chain in a decentralized manner. The document discusses the technical aspects of blockchain like transactions, blocks, consensus algorithms, mining and validation, as well as its applications across different industries.
Blockchain technology allows for transparent and secure transactions without an intermediary. It has various applications including financial services, smart contracts, IoT, and more. Key benefits are security, transparency, low costs, and reduced time. Blockchain functions by recording transactions in blocks that are linked using cryptography. Programming languages like Java and frameworks like Ethereum and Hyperledger can be used to develop blockchain applications. Databases can also integrate blockchain features to provide a scalable solution for deploying blockchain proofs-of-concept, platforms and applications.
An introduction to Ethereum, the peer to peer computing framework based on the blockchain design. It describes how Ethereum relates to earlier blockchain technologies and how it represents an evolution of these technologies
This document provides an overview of blockchain technology. It defines blockchain as a decentralized data structure that allows for a secure, immutable transaction system. The document then briefly outlines the history of blockchain, starting with Satoshi Nakamoto's 2008 paper introducing Bitcoin. It provides a simple technical explanation of blockchain components like hash functions, hash pointers, and blocks. The document also discusses consensus mechanisms like proof-of-work, smart contracts, decentralized applications, and challenges facing blockchain adoption and scalability.
This document provides a tutorial on how to build your first blockchain in three steps:
1. It explains the key components of blockchain including cryptography, peer-to-peer networks, and programming.
2. It demonstrates how to set up and run a private blockchain using the Multichain platform in 10 minutes.
3. It briefly introduces Hyperledger as an alternative open source blockchain platform supported by major companies.
This document introduces BigchainDB, a scalable blockchain database built using Python. BigchainDB takes a "blockchain-ify big data" approach by leveraging existing distributed database techniques like Paxos to provide high throughput and low latency, while also incorporating blockchain characteristics like decentralization, immutability, and digital assets. It uses a federated voting system across nodes to validate transactions in blocks for decentralization. Benchmarks show it can process thousands of writes per second across dozens of nodes. Potential use cases include supply chain tracking for diamonds, energy, and medical journals.
This document summarizes key aspects of blockchain technology. It begins by explaining what a blockchain is and how transactions work, using public/private keys to securely transfer balances. It describes how blocks of transactions are timestamped and added to the chain through a proof-of-work process. Examples of blockchain applications include supply chain management, solar energy sharing, and decentralized autonomous organizations. The document cautions that blockchain may not always be the best solution and provides tips to avoid pointless blockchain projects. It also discusses challenges like scalability that proposed solutions are aiming to address.
This document provides an introduction and overview of BigchainDB, including its architecture, transaction and consensus models, and potential use cases. The architecture uses a federated consensus model with blocks containing batches of transactions. Nodes vote on block validity using a consensus algorithm tolerant of some node failures. Examples of potential applications include tracking intellectual property assets, contracts, and high-volume financial/physical assets.
A blockchain is a distributed database on a peer-to-peer network. It is the underlying technology of the bitcoin cryptocurrency. Secure transactions between users are possible without the need for a central server or trusted authority. Blockchain technology can be used for other cases than money transfer, such as exchange of other assets, votes or credits and for provenance or identity management. Recently, discussions started whether this technology could be useful for (life) sciences. The blockchain technology will be explained and its potential and weaknesses. Examples of current business applications will be given and ideas for education, the research life cycle and biomedical and health care applications.
This is the introductory material to blockchain that I had at the Firenze Linux User Group meeting http://www.firenze.linux.it/2018/02/il-bitcoin-e-le-altre/
201811 Bitcoin, Blockchain and the Technology behind CryptocurrenciesPaperchain
Half Moon Seminer presentation for CLE credits.
Goes through the technologies that underly blockchain systems, smart contracts, tokens and their applications across a number of industry verticals.
This document provides an overview of Bitcoin, including:
- Bitcoin uses a decentralized blockchain and proof-of-work to allow digital currency transactions without a central authority.
- Transactions are recorded on the blockchain, and each transaction includes the hash of the previous transaction to link transactions together in a chain.
- Miners process transactions by finding a proof-of-work for the block and receive new bitcoins as a reward, securing the network through validating transactions.
- Future research areas include improving anonymity, security of wallets from theft, and mitigating attacks like Sybil and denial of service.
A short seminar presentation on the technical background of Bitcoins. Some basic concepts behind bitcoin addresses are discussed. An overview on the concepts of transactions and blocks is given.
The document provides an overview of cryptocurrencies and digital currencies. It discusses why crypto is important for information security, IP protection, and protection against ransomware. It then outlines a plan to cover Bitcoin and its history, characters, mechanisms, blockchain, symmetric and asymmetric crypto algorithms, breaking crypto difficulties, and comparisons to other digital currencies like Litecoin. Practical exercises on wallets, transfers, and exchanges are also mentioned. Additional advanced topics like SegWit, zero-knowledge proofs, and homomorphic encryption are included as bonuses.
The document discusses blockchain technology and its potential use cases. It provides an overview of hashing and how it is used to create a cryptographic fingerprint or message digest of digital content. It then explains how distributed ledger technology (DLT) uses hashing and consensus between nodes to record transactions in an immutable and decentralized manner, like in blockchain networks. Specific examples covered include how Bitcoin uses cryptography and mining to create and transact the cryptocurrency. The document also discusses how smart contracts can automate predefined terms and conditions using blockchain. Several potential future use cases are proposed, such as tracking supply chain provenance, managing medical records, and notarizing legal documents with long-term validation.
Boolberry improves on existing CryptoNote coins by calculating transaction IDs using only the transaction prefix, excluding ring signatures. This allows ring signatures to be cut off from old transactions, reducing block chain bloat by 55-90% compared to ordinary CryptoNote coins while still proving transactions belong to blocks. Boolberry is designed to be more efficient and provide a more compact, faster synchronizing block chain for a better user experience.
A brief introduction to Blockchain and the underlying technology of distributed computing, challenges and future scope.
Copyrights belong to the respective owners, intention is purely for informational/educational purpose
I would like to thank various blogs, technical tutorials, books, videos to help me understand the basics and collate this presentaion
During this presentation, we will cover a brief introduction into Blockchain technology, historic use cases & emerging trends for Blockchain technology. We will also touch on what to expect from Blockchain technology in 2019. It is important to understand the progress that is being achieved every day with every single step we take towards real use cases for Blockchain projects. 2019 might be the first year where the Blockchain starts to become a central part in people’s lives and in some industries.
Main points covered:
• Conduct a brief introduction to Blockchain technology;
• Discuss both historic use cases and emerging trends for Blockchain technology;
• What to expect from Blockchain technology in 2019
Presenter:
Our presenter for this webinar is Kenneth Kimbel, a Cybersecurity professional with over five years of overall experience providing diverse technology services in client-facing roles. Recent Master’s in Cybersecurity Risk Management as well as a JD with a Cybersecurity Law focus. Currently, Kenneth is a data privacy and Cybersecurity Advisory Consultant with Deloitte. He is also knowledgeable on both current technical and legal issues in security.
Date: March 27th, 2019
Recorded webinar: https://youtu.be/fLjVgj6MAPY
The presentation consists of various methodologies of cryptography and types of cryptocurrencies. The slides include information about how data mining is done for creating new Bitcoins. Also, how do transactions occur; Advantages and disadvantages of Bitcoins; Future Growth of Bitcoins.
Blockchain: The New Technology of TrustMarco Segato
An introductory presentation of the technology that is said to change the world, the result of practical research and participation in the Permanent Observatory of the Polytechnic University of Milan.
The document provides an overview of blockchain technology, including its key components and how it works. In 3 sentences:
Blockchain is a distributed ledger of transactions stored in encrypted blocks that are chained together, with each new block recording transactions and a hash of the previous block. The blockchain is maintained through a consensus mechanism where participants validate transactions and add new blocks to the chain in a decentralized manner. The document discusses the technical aspects of blockchain like transactions, blocks, consensus algorithms, mining and validation, as well as its applications across different industries.
Blockchain technology allows for transparent and secure transactions without an intermediary. It has various applications including financial services, smart contracts, IoT, and more. Key benefits are security, transparency, low costs, and reduced time. Blockchain functions by recording transactions in blocks that are linked using cryptography. Programming languages like Java and frameworks like Ethereum and Hyperledger can be used to develop blockchain applications. Databases can also integrate blockchain features to provide a scalable solution for deploying blockchain proofs-of-concept, platforms and applications.
An introduction to Ethereum, the peer to peer computing framework based on the blockchain design. It describes how Ethereum relates to earlier blockchain technologies and how it represents an evolution of these technologies
This document provides an overview of blockchain technology. It defines blockchain as a decentralized data structure that allows for a secure, immutable transaction system. The document then briefly outlines the history of blockchain, starting with Satoshi Nakamoto's 2008 paper introducing Bitcoin. It provides a simple technical explanation of blockchain components like hash functions, hash pointers, and blocks. The document also discusses consensus mechanisms like proof-of-work, smart contracts, decentralized applications, and challenges facing blockchain adoption and scalability.
This document provides a tutorial on how to build your first blockchain in three steps:
1. It explains the key components of blockchain including cryptography, peer-to-peer networks, and programming.
2. It demonstrates how to set up and run a private blockchain using the Multichain platform in 10 minutes.
3. It briefly introduces Hyperledger as an alternative open source blockchain platform supported by major companies.
This document introduces BigchainDB, a scalable blockchain database built using Python. BigchainDB takes a "blockchain-ify big data" approach by leveraging existing distributed database techniques like Paxos to provide high throughput and low latency, while also incorporating blockchain characteristics like decentralization, immutability, and digital assets. It uses a federated voting system across nodes to validate transactions in blocks for decentralization. Benchmarks show it can process thousands of writes per second across dozens of nodes. Potential use cases include supply chain tracking for diamonds, energy, and medical journals.
This document summarizes key aspects of blockchain technology. It begins by explaining what a blockchain is and how transactions work, using public/private keys to securely transfer balances. It describes how blocks of transactions are timestamped and added to the chain through a proof-of-work process. Examples of blockchain applications include supply chain management, solar energy sharing, and decentralized autonomous organizations. The document cautions that blockchain may not always be the best solution and provides tips to avoid pointless blockchain projects. It also discusses challenges like scalability that proposed solutions are aiming to address.
This document provides an introduction and overview of BigchainDB, including its architecture, transaction and consensus models, and potential use cases. The architecture uses a federated consensus model with blocks containing batches of transactions. Nodes vote on block validity using a consensus algorithm tolerant of some node failures. Examples of potential applications include tracking intellectual property assets, contracts, and high-volume financial/physical assets.
A blockchain is a distributed database on a peer-to-peer network. It is the underlying technology of the bitcoin cryptocurrency. Secure transactions between users are possible without the need for a central server or trusted authority. Blockchain technology can be used for other cases than money transfer, such as exchange of other assets, votes or credits and for provenance or identity management. Recently, discussions started whether this technology could be useful for (life) sciences. The blockchain technology will be explained and its potential and weaknesses. Examples of current business applications will be given and ideas for education, the research life cycle and biomedical and health care applications.
This is the introductory material to blockchain that I had at the Firenze Linux User Group meeting http://www.firenze.linux.it/2018/02/il-bitcoin-e-le-altre/
201811 Bitcoin, Blockchain and the Technology behind CryptocurrenciesPaperchain
Half Moon Seminer presentation for CLE credits.
Goes through the technologies that underly blockchain systems, smart contracts, tokens and their applications across a number of industry verticals.
This document provides an overview of Bitcoin, including:
- Bitcoin uses a decentralized blockchain and proof-of-work to allow digital currency transactions without a central authority.
- Transactions are recorded on the blockchain, and each transaction includes the hash of the previous transaction to link transactions together in a chain.
- Miners process transactions by finding a proof-of-work for the block and receive new bitcoins as a reward, securing the network through validating transactions.
- Future research areas include improving anonymity, security of wallets from theft, and mitigating attacks like Sybil and denial of service.
A short seminar presentation on the technical background of Bitcoins. Some basic concepts behind bitcoin addresses are discussed. An overview on the concepts of transactions and blocks is given.
The document provides an overview of cryptocurrencies and digital currencies. It discusses why crypto is important for information security, IP protection, and protection against ransomware. It then outlines a plan to cover Bitcoin and its history, characters, mechanisms, blockchain, symmetric and asymmetric crypto algorithms, breaking crypto difficulties, and comparisons to other digital currencies like Litecoin. Practical exercises on wallets, transfers, and exchanges are also mentioned. Additional advanced topics like SegWit, zero-knowledge proofs, and homomorphic encryption are included as bonuses.
The document discusses blockchain technology and its potential use cases. It provides an overview of hashing and how it is used to create a cryptographic fingerprint or message digest of digital content. It then explains how distributed ledger technology (DLT) uses hashing and consensus between nodes to record transactions in an immutable and decentralized manner, like in blockchain networks. Specific examples covered include how Bitcoin uses cryptography and mining to create and transact the cryptocurrency. The document also discusses how smart contracts can automate predefined terms and conditions using blockchain. Several potential future use cases are proposed, such as tracking supply chain provenance, managing medical records, and notarizing legal documents with long-term validation.
Blockchain technology and bitcoin allow for a distributed, secure digital ledger of transactions stored in blocks of data. A blockchain first demonstrated this through bitcoin, a digital currency that uses a peer-to-peer network, proof of work, and a finite supply to achieve transaction consensus without a central authority. Key features of bitcoin include its deflationary and divisible nature, low or no transaction fees, and resistance to counterfeiting. Its value comes from use by merchants and a growing market cap despite being an alternative to traditional currency and payment systems. Alternate cryptocurrencies later improved on bitcoin's technology by changing hashing functions and block times.
This document discusses cryptocurrency and provides an overview of Bitcoin. It defines cryptocurrency as a digital currency secured through cryptography that allows for peer-to-peer transactions without an intermediary. The document outlines the risks of cryptocurrency including hackers, lack of protections, costs, and scams. It also describes how Bitcoin works, including how the blockchain records transactions in blocks to form a public ledger. Mining is explained as the process of adding new transaction records to the blockchain by solving complex math problems.
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.
Upfront Ventures blockchain and crypto deckMark Suster
Mark Suster of Upfront Ventures gives a presentation primer on Cryptocurrencies & Blockchain. This is best consumed with a video that will be released and available on Upfront's YouTube page: https://www.youtube.com/user/upfrontventures/videos
This presentation is about blockchain.
When Thomas Edison invented the electric lamp in 1879, he did not make a market analysis. The market did not have an identified need for a lamp but for light. This is a kind of disruptive original ideas.
Satoshi Nakamoto (a person or a group) did not do a market analysis neither . The blockchain was born after the financial crisis of 2008 as people lost trust in banks.
Satoshi Nakamoto introduced a new model of trust based on cryptographic proof in a decentralised & distributed ledger.
What is bloackchain technology ? Why blockchain is disruptive? And what are the main blockchain technologies ?
Blockchain is a decentralized ledger or list of all transactions across a peer-to-peer network. It underlies technologies like Bitcoin and has potential to disrupt many business processes. No single user controls the blockchain, transactions are broadcast to the network and validated through consensus. The author of the blockchain concept is unknown, thought to use the pseudonym Satoshi Nakamoto. Blockchains use techniques like proof-of-work to serialize changes and achieve distributed consensus to maintain integrity without centralized authority.
Blockchain technology is a distributed ledger that records transactions in digital blocks chained together using cryptography. It allows for decentralized consensus on a shared transaction history without the need for a central authority. Key elements include distributed ledgers that maintain copies of transactions across many nodes, cryptographic hash functions and digital signatures for security, and consensus algorithms to validate transactions and reach agreement in a decentralized network. Blockchain technology has the potential to disrupt many industries by facilitating trust and transparency in peer-to-peer transactions.
Python, Blockchain, and Byte-Size ChangePortia Burton
Portia Burton gave a presentation on Python, blockchain, and byte-size changes. She began with an introduction and overview of blockchains and cryptocurrencies like Bitcoin. She then discussed Ethereum, smart contracts, and different consensus mechanisms. Burton explained how average developers can build blockchain applications using Python tools and libraries. She concluded by discussing potential impacts of blockchain technology on areas like democracy, finance, and the sharing economy.
This document provides an overview of blockchain technology and distributed ledgers. It begins with the story of Bitcoin's origins in response to the 2008 financial crisis. It then explains key concepts like distributed ledgers, smart contracts, tokens, proof-of-work, private-public keys, and addresses. Issues discussed include classification of cryptocurrencies, identity, complexity challenges, legal issues, capital raising, data ownership, and energy consumption concerns related to mining. The goal is to help understand implications of this technology for citizens, businesses, and governments.
This document provides an introduction to blockchain credit and distributed ledger technology. It discusses the problems with traditional systems that rely on centralized authorities, and how blockchain solves this through decentralization and immutability. Blockchain achieves this by bundling digital messages into cryptographically-secured blocks that are linked together in a timestamped chain. This allows for the chronicling of transactions in a way that anyone can verify but cannot be altered. The document then discusses applications of blockchain like cryptocurrencies, smart contracts, and blockchain platforms like Hyperledger and R3. It also covers criticisms of blockchain and fundamentals of cryptographic hash functions used in blockchain.
Blockchain and cryptocurrencies are emerging technologies that are still not fully understood. There are differing views on their value. Blockchain is a distributed digital ledger of transactions that is replicated across multiple computers. Cryptocurrencies like Bitcoin use blockchain technology, and their value comes from factors like production costs, scarcity, and utility. Ethereum enables decentralized applications and smart contracts through its cryptocurrency Ether. Altcoins have proliferated since Bitcoin, with some gaining significant value through network effects. Initial coin offerings have also raised billions for new blockchain projects.
Blockchain, cryptography and tokens — NYC Bar presentationPaperchain
Concise version of presentation delivered at the NYC Bar Association.
Overview of blockchains, how cryptography works on blockchains and the difference between cryptocurrencies and tokens.
IOTA uses a directed acyclic graph (DAG) structure called The Tangle, rather than a blockchain, to record transactions. In the Tangle, each transaction must validate two previous transactions by performing proof of work. This decentralized approach allows transactions to be confirmed asynchronously by the network. Transaction confirmation is determined using a Markov Chain Monte Carlo algorithm to assess whether a transaction is indirectly approved by all network tips. IOTA aims to allow for high transaction throughput, decentralized validation of transactions, and no transaction fees.
Understanding Proof of Work (PoW) and Proof of Stake (PoS) AlgorithmsGautam Anand
The document summarizes Proof of Stake (PoS) and compares it to Proof of Work (PoW). It discusses how PoS works by having validators stake coins to validate transactions and forge new blocks, earning transaction fees, rather than expending computing power like in PoW. PoS is more efficient and deters attacks as validators who validate fraudulent transactions lose part of their stake. While a 51% attack is theoretically possible in PoS, it would require buying a majority of the total coin supply, making it impractical. Popular blockchains that use PoS include NXT, BlackCoin and Peercoin.
Bits, Blocks, and Chains: A Concise Examination of Bitcoin and Cryptocurrency...Richard Givens
Bitcoin is a digital currency created through cryptography and advanced mathematics. It is recorded through a blockchain, which is a distributed digital ledger of transactions grouped into blocks. Each block contains a cryptographic hash of the previous block, linking all transactions in a chain. Bitcoin is "mined" through solving computationally difficult puzzles to validate transactions and create new blocks. This process secures the blockchain from manipulation.
Blockchain concept and technology. How this is becoming the next trend after the Bitcoin, expanding to a myriad of solutions. Smart contracts might be using a public distributed, and encrypted platform to support data persistence.
The project deals about how blockchain works, proof-of-work and merkle tree hash function. The project also tries to explain how the bitcoin uses ECDSA algorithmt power the cryptography.
1. AWS IoT allows devices to communicate with each other and applications using MQTT protocol. It acts as a broker between devices and applications.
2. The Rules Engine in AWS IoT can transform and route incoming data from devices to other endpoints like Lambda functions, databases or SNS.
3. Device Shadows in AWS IoT create virtual representations of devices that can receive messages even when devices are offline, and sync the latest state to devices when they reconnect.
IPFS is a protocol designed to create a permanent and decentralized method of storing and sharing files faster, safer and more openly. It aims to replace HTTP and build a better web for all. IPFS uses a fully distributed network where each client acts as both client and server. It allows for distributing high volumes of data with high efficiency unlike HTTP which downloads from a single source. Any data structure can be represented as a directed acyclic graph (DAG) in IPFS.
How to create ethereum token (A plan coin ico)承翰 蔡
This document provides instructions for creating an Ethereum token. It explains what an initial coin offering (ICO) is and the ERC-20 token standard. It then outlines the steps to create a token, including defining parameters like name and supply, setting exchange rates, adding modifiers, and implementing payment, withdrawal, and refund methods. The token contract can check block numbers and transition between different stages like in progress and ended.
The document discusses the Web of Things (WoT), which uses web technologies like URLs, HTTP, and REST to connect physical devices over the Internet of Things (IoT). WoT defines four layers - Access, Find, Share, and Compose - to standardize how IoT devices can be discovered, accessed, and integrated into applications. It also presents a WoT model and common constructs like properties and actions to represent IoT devices as web resources that can be manipulated using HTTP verbs. Examples show how a WoT device's root resource and actions can be retrieved and executed.
Introduce how to setting AWS IoT CLI package in Ubuntu 14.04, and describes the characteristics of the platform, such as device gateway. thing shadow, etc.
This document summarizes the results of benchmarks testing the performance of different versions of MongoDB for write, storage size, and read operations. The benchmarks show that MongoDB 3.0 with wiredTiger and compression enabled had the best performance for write operations, smallest storage size, and competitive read performance compared to earlier versions.
Turn websites into structured APIs from your browser in seconds without writing any code or installing any software. The Kimono API uses standard HTTP response codes and returns data in JSON format. It allows getting, listing, updating, and starting crawls of APIs and includes parameters for versions, CSV, RSS formatting, limiting, offsetting, paging, including URLs, indexing, hashing, time series, stats, and modifying data. Kimono can download data into Google Spreadsheets, embed APIs on sites, create mobile apps from APIs, set up email alerts, and scrape data behind logins.
GraphRAG for Life Science to increase LLM accuracyTomaz Bratanic
GraphRAG for life science domain, where you retriever information from biomedical knowledge graphs using LLMs to increase the accuracy and performance of generated answers
Sudheer Mechineni, Head of Application Frameworks, Standard Chartered Bank
Discover how Standard Chartered Bank harnessed the power of Neo4j to transform complex data access challenges into a dynamic, scalable graph database solution. This keynote will cover their journey from initial adoption to deploying a fully automated, enterprise-grade causal cluster, highlighting key strategies for modelling organisational changes and ensuring robust disaster recovery. Learn how these innovations have not only enhanced Standard Chartered Bank’s data infrastructure but also positioned them as pioneers in the banking sector’s adoption of graph technology.
Driving Business Innovation: Latest Generative AI Advancements & Success StorySafe Software
Are you ready to revolutionize how you handle data? Join us for a webinar where we’ll bring you up to speed with the latest advancements in Generative AI technology and discover how leveraging FME with tools from giants like Google Gemini, Amazon, and Microsoft OpenAI can supercharge your workflow efficiency.
During the hour, we’ll take you through:
Guest Speaker Segment with Hannah Barrington: Dive into the world of dynamic real estate marketing with Hannah, the Marketing Manager at Workspace Group. Hear firsthand how their team generates engaging descriptions for thousands of office units by integrating diverse data sources—from PDF floorplans to web pages—using FME transformers, like OpenAIVisionConnector and AnthropicVisionConnector. This use case will show you how GenAI can streamline content creation for marketing across the board.
Ollama Use Case: Learn how Scenario Specialist Dmitri Bagh has utilized Ollama within FME to input data, create custom models, and enhance security protocols. This segment will include demos to illustrate the full capabilities of FME in AI-driven processes.
Custom AI Models: Discover how to leverage FME to build personalized AI models using your data. Whether it’s populating a model with local data for added security or integrating public AI tools, find out how FME facilitates a versatile and secure approach to AI.
We’ll wrap up with a live Q&A session where you can engage with our experts on your specific use cases, and learn more about optimizing your data workflows with AI.
This webinar is ideal for professionals seeking to harness the power of AI within their data management systems while ensuring high levels of customization and security. Whether you're a novice or an expert, gain actionable insights and strategies to elevate your data processes. Join us to see how FME and AI can revolutionize how you work with data!
TrustArc Webinar - 2024 Global Privacy SurveyTrustArc
How does your privacy program stack up against your peers? What challenges are privacy teams tackling and prioritizing in 2024?
In the fifth annual Global Privacy Benchmarks Survey, we asked over 1,800 global privacy professionals and business executives to share their perspectives on the current state of privacy inside and outside of their organizations. This year’s report focused on emerging areas of importance for privacy and compliance professionals, including considerations and implications of Artificial Intelligence (AI) technologies, building brand trust, and different approaches for achieving higher privacy competence scores.
See how organizational priorities and strategic approaches to data security and privacy are evolving around the globe.
This webinar will review:
- The top 10 privacy insights from the fifth annual Global Privacy Benchmarks Survey
- The top challenges for privacy leaders, practitioners, and organizations in 2024
- Key themes to consider in developing and maintaining your privacy program
Essentials of Automations: The Art of Triggers and Actions in FMESafe Software
In this second installment of our Essentials of Automations webinar series, we’ll explore the landscape of triggers and actions, guiding you through the nuances of authoring and adapting workspaces for seamless automations. Gain an understanding of the full spectrum of triggers and actions available in FME, empowering you to enhance your workspaces for efficient automation.
We’ll kick things off by showcasing the most commonly used event-based triggers, introducing you to various automation workflows like manual triggers, schedules, directory watchers, and more. Plus, see how these elements play out in real scenarios.
Whether you’re tweaking your current setup or building from the ground up, this session will arm you with the tools and insights needed to transform your FME usage into a powerhouse of productivity. Join us to discover effective strategies that simplify complex processes, enhancing your productivity and transforming your data management practices with FME. Let’s turn complexity into clarity and make your workspaces work wonders!
UiPath Test Automation using UiPath Test Suite series, part 5DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 5. In this session, we will cover CI/CD with devops.
Topics covered:
CI/CD with in UiPath
End-to-end overview of CI/CD pipeline with Azure devops
Speaker:
Lyndsey Byblow, Test Suite Sales Engineer @ UiPath, Inc.
Best 20 SEO Techniques To Improve Website Visibility In SERPPixlogix Infotech
Boost your website's visibility with proven SEO techniques! Our latest blog dives into essential strategies to enhance your online presence, increase traffic, and rank higher on search engines. From keyword optimization to quality content creation, learn how to make your site stand out in the crowded digital landscape. Discover actionable tips and expert insights to elevate your SEO game.
UiPath Test Automation using UiPath Test Suite series, part 6DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 6. In this session, we will cover Test Automation with generative AI and Open AI.
UiPath Test Automation with generative AI and Open AI webinar offers an in-depth exploration of leveraging cutting-edge technologies for test automation within the UiPath platform. Attendees will delve into the integration of generative AI, a test automation solution, with Open AI advanced natural language processing capabilities.
Throughout the session, participants will discover how this synergy empowers testers to automate repetitive tasks, enhance testing accuracy, and expedite the software testing life cycle. Topics covered include the seamless integration process, practical use cases, and the benefits of harnessing AI-driven automation for UiPath testing initiatives. By attending this webinar, testers, and automation professionals can gain valuable insights into harnessing the power of AI to optimize their test automation workflows within the UiPath ecosystem, ultimately driving efficiency and quality in software development processes.
What will you get from this session?
1. Insights into integrating generative AI.
2. Understanding how this integration enhances test automation within the UiPath platform
3. Practical demonstrations
4. Exploration of real-world use cases illustrating the benefits of AI-driven test automation for UiPath
Topics covered:
What is generative AI
Test Automation with generative AI and Open AI.
UiPath integration with generative AI
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
Infrastructure Challenges in Scaling RAG with Custom AI modelsZilliz
Building Retrieval-Augmented Generation (RAG) systems with open-source and custom AI models is a complex task. This talk explores the challenges in productionizing RAG systems, including retrieval performance, response synthesis, and evaluation. We’ll discuss how to leverage open-source models like text embeddings, language models, and custom fine-tuned models to enhance RAG performance. Additionally, we’ll cover how BentoML can help orchestrate and scale these AI components efficiently, ensuring seamless deployment and management of RAG systems in the cloud.
Observability Concepts EVERY Developer Should Know -- DeveloperWeek Europe.pdfPaige Cruz
Monitoring and observability aren’t traditionally found in software curriculums and many of us cobble this knowledge together from whatever vendor or ecosystem we were first introduced to and whatever is a part of your current company’s observability stack.
While the dev and ops silo continues to crumble….many organizations still relegate monitoring & observability as the purview of ops, infra and SRE teams. This is a mistake - achieving a highly observable system requires collaboration up and down the stack.
I, a former op, would like to extend an invitation to all application developers to join the observability party will share these foundational concepts to build on:
Threats to mobile devices are more prevalent and increasing in scope and complexity. Users of mobile devices desire to take full advantage of the features
available on those devices, but many of the features provide convenience and capability but sacrifice security. This best practices guide outlines steps the users can take to better protect personal devices and information.
Goodbye Windows 11: Make Way for Nitrux Linux 3.5.0!SOFTTECHHUB
As the digital landscape continually evolves, operating systems play a critical role in shaping user experiences and productivity. The launch of Nitrux Linux 3.5.0 marks a significant milestone, offering a robust alternative to traditional systems such as Windows 11. This article delves into the essence of Nitrux Linux 3.5.0, exploring its unique features, advantages, and how it stands as a compelling choice for both casual users and tech enthusiasts.
HCL Notes und Domino Lizenzkostenreduzierung in der Welt von DLAUpanagenda
Webinar Recording: https://www.panagenda.com/webinars/hcl-notes-und-domino-lizenzkostenreduzierung-in-der-welt-von-dlau/
DLAU und die Lizenzen nach dem CCB- und CCX-Modell sind für viele in der HCL-Community seit letztem Jahr ein heißes Thema. Als Notes- oder Domino-Kunde haben Sie vielleicht mit unerwartet hohen Benutzerzahlen und Lizenzgebühren zu kämpfen. Sie fragen sich vielleicht, wie diese neue Art der Lizenzierung funktioniert und welchen Nutzen sie Ihnen bringt. Vor allem wollen Sie sicherlich Ihr Budget einhalten und Kosten sparen, wo immer möglich. Das verstehen wir und wir möchten Ihnen dabei helfen!
Wir erklären Ihnen, wie Sie häufige Konfigurationsprobleme lösen können, die dazu führen können, dass mehr Benutzer gezählt werden als nötig, und wie Sie überflüssige oder ungenutzte Konten identifizieren und entfernen können, um Geld zu sparen. Es gibt auch einige Ansätze, die zu unnötigen Ausgaben führen können, z. B. wenn ein Personendokument anstelle eines Mail-Ins für geteilte Mailboxen verwendet wird. Wir zeigen Ihnen solche Fälle und deren Lösungen. Und natürlich erklären wir Ihnen das neue Lizenzmodell.
Nehmen Sie an diesem Webinar teil, bei dem HCL-Ambassador Marc Thomas und Gastredner Franz Walder Ihnen diese neue Welt näherbringen. Es vermittelt Ihnen die Tools und das Know-how, um den Überblick zu bewahren. Sie werden in der Lage sein, Ihre Kosten durch eine optimierte Domino-Konfiguration zu reduzieren und auch in Zukunft gering zu halten.
Diese Themen werden behandelt
- Reduzierung der Lizenzkosten durch Auffinden und Beheben von Fehlkonfigurationen und überflüssigen Konten
- Wie funktionieren CCB- und CCX-Lizenzen wirklich?
- Verstehen des DLAU-Tools und wie man es am besten nutzt
- Tipps für häufige Problembereiche, wie z. B. Team-Postfächer, Funktions-/Testbenutzer usw.
- Praxisbeispiele und Best Practices zum sofortigen Umsetzen
In his public lecture, Christian Timmerer provides insights into the fascinating history of video streaming, starting from its humble beginnings before YouTube to the groundbreaking technologies that now dominate platforms like Netflix and ORF ON. Timmerer also presents provocative contributions of his own that have significantly influenced the industry. He concludes by looking at future challenges and invites the audience to join in a discussion.
For the full video of this presentation, please visit: https://www.edge-ai-vision.com/2024/06/building-and-scaling-ai-applications-with-the-nx-ai-manager-a-presentation-from-network-optix/
Robin van Emden, Senior Director of Data Science at Network Optix, presents the “Building and Scaling AI Applications with the Nx AI Manager,” tutorial at the May 2024 Embedded Vision Summit.
In this presentation, van Emden covers the basics of scaling edge AI solutions using the Nx tool kit. He emphasizes the process of developing AI models and deploying them globally. He also showcases the conversion of AI models and the creation of effective edge AI pipelines, with a focus on pre-processing, model conversion, selecting the appropriate inference engine for the target hardware and post-processing.
van Emden shows how Nx can simplify the developer’s life and facilitate a rapid transition from concept to production-ready applications.He provides valuable insights into developing scalable and efficient edge AI solutions, with a strong focus on practical implementation.
Removing Uninteresting Bytes in Software FuzzingAftab Hussain
Imagine a world where software fuzzing, the process of mutating bytes in test seeds to uncover hidden and erroneous program behaviors, becomes faster and more effective. A lot depends on the initial seeds, which can significantly dictate the trajectory of a fuzzing campaign, particularly in terms of how long it takes to uncover interesting behaviour in your code. We introduce DIAR, a technique designed to speedup fuzzing campaigns by pinpointing and eliminating those uninteresting bytes in the seeds. Picture this: instead of wasting valuable resources on meaningless mutations in large, bloated seeds, DIAR removes the unnecessary bytes, streamlining the entire process.
In this work, we equipped AFL, a popular fuzzer, with DIAR and examined two critical Linux libraries -- Libxml's xmllint, a tool for parsing xml documents, and Binutil's readelf, an essential debugging and security analysis command-line tool used to display detailed information about ELF (Executable and Linkable Format). Our preliminary results show that AFL+DIAR does not only discover new paths more quickly but also achieves higher coverage overall. This work thus showcases how starting with lean and optimized seeds can lead to faster, more comprehensive fuzzing campaigns -- and DIAR helps you find such seeds.
- These are slides of the talk given at IEEE International Conference on Software Testing Verification and Validation Workshop, ICSTW 2022.
3. The problems of current blockchain
Centralization of control
Obsolete cryptography
Inability to conduct micropayments
Discrimination of participants
Scalability limits
High requirements for hardware
4. What's DAG?
A directed acyclic graph is
a directed graph that has
no cycles.
Every directed acyclic
graph has a topological
ordering
5. A picture is worth a thousand words
Iota is a brand new and novel
micro-transaction
cryptotoken optimized for the
IoT. Unlike the complex and
heavy blockchains of Bitcoin
and the like, Iota is created to
be as lightweight as possible
6. The Tangle Ledger
A Tangle is a Directed Acyclic Graph (DAG).
DAG architecture assumes the user and
validator as the same.
A new transaction arrives, it must approve two
previous transactions.
Genesis
7. Tangle Weights
height, as the length of the longest oriented
path to the genesis.
depth, as the length of the longest reverse-
oriented path to some tips.
Height: 1
Length: 3
14. Possible attack scenarios
Quantum computing
Bitcoin: 268 nonces to find suitable hash, that a
quantum computer would need Θ(√N),
√268 = 234 ≈ 17 billion times more efficient.
In iota, find a suitable hash for issuing a
transaction is only around 38, √38 = 34 = 81 times.
15. A picture is worth a thousand words
Byteball is a decentralized
system that allows tamper
proof storage of arbitrary
data, including data that
represents transferrable value
such as currencies, property
titles, debt, shares, etc.
16. The DAG Ledger
There are no blocks in Byteball, and no block
size issue.
Every new transaction references one or more
by including and signing their hashes
A B C
A
B
C
20. How to get free Byteball?
Free distribution to BTC and Byte holders.
For every 16 BTC you receive 1 GB ( = 1 billion bytes)
For every 5 GB you receive additional 1 GB.
主鏈(MC)確立轉賬的關係順序:先進入MC的佔據優先順序。當有雙花現象的時候,先進入主鏈順序的版本為有效,其他無效。
如何決定MC? 從子節點透過最佳父節點演算法,一路連結到創世節點,從另一個子節點開始建構另一條MC,若兩條MC中途有交會,則交會後會延同一條路線直到創世節點,最差的情況是兩條MC直到創世節點才交會。
一旦我們有MC後,就可以在兩個沒有順序的交易中建立總序,從創世節點索引值為0,下一個為1,因此,沿著 MC 向前行進,為位於 MC 上的單元分配索引。對於不在 MC 上的單元,可以找到其中首先包括(直接或間接)該單元的 MC 索引。以這樣的方式,可以給每一個單元指定一個 MC 指數(MCI)。
在兩個非序列中,具有較低 MCI 的那一個被認為是較早並且有效的序列,另一個則無效。如果兩個非序列恰巧具有相同的 MCI,根據 tiebreaker 規則,具有較低散列值的單元是有效的。因此可避免Double-spending問題發生。