The document discusses Bitcoin and Ethereum addresses. It explains how Bitcoin addresses are generated from private keys using SHA-256 hashing and how Ethereum addresses are generated from private keys using elliptic curve cryptography. It also discusses potential attacks on addresses generated from weak brain wallets or passwords that could be cracked using brute force methods or future quantum computers.
I am sending you 1π! Pi is a new digital currency developed by Stanford PhDs, with over 9 million members worldwide. To claim your Pi, follow this link https://minepi.com/krishvikram and use my username (krishvikram) as your invitation code.
Step 1. Install the Pi app with above link
Step 2 verify the profile
Step 3 tap on earnings and share your link and increase your earnings
Step 4 verification type the referral code which is mandatory.
Referral code is : krishvikram
Virtual or digital currencies, with Bitcoin chief amongst them, have been gaining momentum and investment over the last couple of years. Offering an almost costless means of making payments around the globe, virtual currencies have the potential to bring significant disruption to the banking industry. This potential is not lost on either Bitcoin startups or banks themselves. But how does Bitcoin actually work? A peer-to-peer network maintains the “blockchain”, an innovative cryptographic protocol which securely mediates payments between parties without mutual trust. This session will step through the structure of the blockchain, showing how it solves the “double spend” problem and allows decentralised processing of financial transactions. Whether Bitcoin will become the currency of the internet or it’s a bubble that is doomed to burst sooner or later, the blockchain itself will change the face of transactional banking and perhaps other industries along the way.
Presentation to the Sydney Financial Mathematics Workshop (11 March 2015)
http://www.qgroup.org.au/content/bitcoin-banking-and-blockchain
This slidedeck was used at the second Blockchain Vlaanderen meetup in Antwerp. It was given as a general introduction into Blockchain to enable newcomers to follow the presentations that followed.
I am sending you 1π! Pi is a new digital currency developed by Stanford PhDs, with over 9 million members worldwide. To claim your Pi, follow this link https://minepi.com/krishvikram and use my username (krishvikram) as your invitation code.
Step 1. Install the Pi app with above link
Step 2 verify the profile
Step 3 tap on earnings and share your link and increase your earnings
Step 4 verification type the referral code which is mandatory.
Referral code is : krishvikram
Virtual or digital currencies, with Bitcoin chief amongst them, have been gaining momentum and investment over the last couple of years. Offering an almost costless means of making payments around the globe, virtual currencies have the potential to bring significant disruption to the banking industry. This potential is not lost on either Bitcoin startups or banks themselves. But how does Bitcoin actually work? A peer-to-peer network maintains the “blockchain”, an innovative cryptographic protocol which securely mediates payments between parties without mutual trust. This session will step through the structure of the blockchain, showing how it solves the “double spend” problem and allows decentralised processing of financial transactions. Whether Bitcoin will become the currency of the internet or it’s a bubble that is doomed to burst sooner or later, the blockchain itself will change the face of transactional banking and perhaps other industries along the way.
Presentation to the Sydney Financial Mathematics Workshop (11 March 2015)
http://www.qgroup.org.au/content/bitcoin-banking-and-blockchain
This slidedeck was used at the second Blockchain Vlaanderen meetup in Antwerp. It was given as a general introduction into Blockchain to enable newcomers to follow the presentations that followed.
There has been a lot of buzz around blockchain, and its most popular application Bitcoin. But what can organisations actually do with it, and what does it mean for you?
Find out more here about its potential, ecosystem, most popular start-ups and 15 promising cases in 5 different industries: Retail, Financial Services, Healthcare, Real Estate & Insurance.
14 Jan17- Nullmeets -Blockchain concept decoded by Ninad SarangNinad Sarang
Introduction to Blockchain and Bitcoin technologies
Things we will cover,
* What is TRANSACTION ?
* BlockChain !!!……Never heard what is that??
* The BTC Aka BitCoins
* Who discovered?
* How it works?
* Advantages & Disadvantages
* Applications
Intro to Blockchain - And, by the way, what the heck is proof-of-work?Jim Flynn
An overview of bitcoin and the blockchain with a more in-depth description of proof of work (POW). Conde samples used to demonstrate the concepts behind POW are available at http://jamespflynn.com.
Blockchain overview, use cases, implementations and challengesSébastien Tandel
Most know about Bitcoin, the well-known crypto-currency. Less know the details about the underlying and enabling technology, Blockchain.
Hopefully, this presentation provides enough insights to understand blockchain concepts and why it's perceived to potentially disrupt many market segments, from retail to governments, from finance to health care. At last, I hope to brush fairly the many challenges of this rather new technology.
Demonstrating how to create an end-to-end Web-based application that uses blockchain for user authentication, read, and write access to the data stored on the blockchain
Bitcoin, Blockchain and the Crypto Contracts - Part 2Prithwis Mukerjee
Where we explain how the cryptographic ideas are used to create a crypto asset on the block chain. This one part of a three part slide deck. For the full deck and the context please visit http://bit.ly/pm-bbc
A basic overview of what blockchain is with step-by-step easy to follow explanation of its core concepts. It should be easy for anyone with zero knowledge of blockchain to follow through the slides
There has been a lot of buzz around blockchain, and its most popular application Bitcoin. But what can organisations actually do with it, and what does it mean for you?
Find out more here about its potential, ecosystem, most popular start-ups and 15 promising cases in 5 different industries: Retail, Financial Services, Healthcare, Real Estate & Insurance.
14 Jan17- Nullmeets -Blockchain concept decoded by Ninad SarangNinad Sarang
Introduction to Blockchain and Bitcoin technologies
Things we will cover,
* What is TRANSACTION ?
* BlockChain !!!……Never heard what is that??
* The BTC Aka BitCoins
* Who discovered?
* How it works?
* Advantages & Disadvantages
* Applications
Intro to Blockchain - And, by the way, what the heck is proof-of-work?Jim Flynn
An overview of bitcoin and the blockchain with a more in-depth description of proof of work (POW). Conde samples used to demonstrate the concepts behind POW are available at http://jamespflynn.com.
Blockchain overview, use cases, implementations and challengesSébastien Tandel
Most know about Bitcoin, the well-known crypto-currency. Less know the details about the underlying and enabling technology, Blockchain.
Hopefully, this presentation provides enough insights to understand blockchain concepts and why it's perceived to potentially disrupt many market segments, from retail to governments, from finance to health care. At last, I hope to brush fairly the many challenges of this rather new technology.
Demonstrating how to create an end-to-end Web-based application that uses blockchain for user authentication, read, and write access to the data stored on the blockchain
Bitcoin, Blockchain and the Crypto Contracts - Part 2Prithwis Mukerjee
Where we explain how the cryptographic ideas are used to create a crypto asset on the block chain. This one part of a three part slide deck. For the full deck and the context please visit http://bit.ly/pm-bbc
A basic overview of what blockchain is with step-by-step easy to follow explanation of its core concepts. It should be easy for anyone with zero knowledge of blockchain to follow through the slides
There are plenty of bitcoin and blockchain intro decks, so why create another one? Because they are either too technical or too vague on how blockchain actually works! This talk is prepared for audiences who have good educational background and general knowledge about internet. It is used during my trip to Taiwan so some Chinese translations are included. It starts with a basic definition and a functional description of how bitcoin solves the double spending problem, how it was implemented in blockchain, what is mining and why it is critical to the bitcoin ecosystem. Based on these understandings, it goes up a level to talk about how to use cryptocurrencies, the characteristics of a blockchain, and why it has the potential to disrupt financial services and beyond. The talk finishes with an overview of the cryptocurreny market, the rise of Ethereum, and the recent ICO phenomenon. There are several versions of this presentation. This particular version is for financial services professionals so there is more emphasis on blockchain adoption. The CS version covers the math behind mining in more depth, and the general public version provides some cautionary notes regarding speculating on cryptocurrencies. LINE characters are used in illustrations due to their popularity in Taiwan. The American version uses the Simpsons.
The Next Frontier of Bitcoin - Inside Bitcoins ChicagoJeff Garzik
It is still the early days of bitcoin in year 2015. Layer 2 services such as payment channels, side chains, smart contracts and smart property will yield amazing developments which reshape life as we know it.
Blockchain & Cryptocurrencies Intro - July 2017🔗Audrey Chaing
An overview of blockchain, cryptocurrencies, Bitcoin, Ethereum, ICOs. Meant to be introductory level but provide a slightly higher level of detail. Includes some companies to watch in the blockchain space. Prepared before the August 1 fork, which did occur.
State of Blockchain 2017: Smartnetworks and the Blockchain EconomyMelanie Swan
Blockchain is a fundamental IT for secure value transfer over networks. For any asset registered in a cryptographic ledger, the whole Internet is a VPN for its confirmation, assurity, and transfer. Blockchain reinvents economics and governance for the digital age. The long-tail structure of digital networks allows personalized economic and governance services. Smartnetworks are a new form of automated global infrastructure for large-scale next-generation projects.
Bitcoin and blockchain are not the same things, although they are related in that blockchain technology was first described and implemented in Bitcoin. Learn More about Blockchain:
Bitcoin is a peer-to-peer electronic cash system and the first truly decentralized network for sending and receiving value over the Internet. This presentation gets into the details of the technology and answers common questions related to the bitcoin, how it works.
Bitcoin is the world's first cryptocurrency, a form of electronic cash. It is the first decentralized digital currency: the system was designed to work without a central bank or single administrator.
WSO2Con USA 2017: Keynote - The Blockchain’s Digital DisruptionWSO2
Almost a decade ago, little-known open-source cryptocurrency called Bitcoin made its debut with little fanfare. Its underlying technological innovation has now caught the world’s attention; developers, startups, corporations, academic institutions, and governments are all examining what blockchain technology can solve. Currency, assets, identity, trade settlement, cross-border payments, privacy and regulation are areas being explored. This session will explore the past, present, and future of blockchain technology and how it may influence your business.
The blockchain ecosystem is evolving rapidly. Wing Venture Capital has put together a Blockchain 101 Presentation to serve as a primer for the emerging cryptoasset economy.
The blockchain ecosystem is evolving rapidly. Wing Venture Capital has put together a Blockchain 101 Presentation to serve as a primer for the emerging cryptoasset economy.
Gamify Your Mind; The Secret Sauce to Delivering Success, Continuously Improv...Shahin Sheidaei
Games are powerful teaching tools, fostering hands-on engagement and fun. But they require careful consideration to succeed. Join me to explore factors in running and selecting games, ensuring they serve as effective teaching tools. Learn to maintain focus on learning objectives while playing, and how to measure the ROI of gaming in education. Discover strategies for pitching gaming to leadership. This session offers insights, tips, and examples for coaches, team leads, and enterprise leaders seeking to teach from simple to complex concepts.
Strategies for Successful Data Migration Tools.pptxvarshanayak241
Data migration is a complex but essential task for organizations aiming to modernize their IT infrastructure and leverage new technologies. By understanding common challenges and implementing these strategies, businesses can achieve a successful migration with minimal disruption. Data Migration Tool like Ask On Data play a pivotal role in this journey, offering features that streamline the process, ensure data integrity, and maintain security. With the right approach and tools, organizations can turn the challenge of data migration into an opportunity for growth and innovation.
Unleash Unlimited Potential with One-Time Purchase
BoxLang is more than just a language; it's a community. By choosing a Visionary License, you're not just investing in your success, you're actively contributing to the ongoing development and support of BoxLang.
Cyaniclab : Software Development Agency Portfolio.pdfCyanic lab
CyanicLab, an offshore custom software development company based in Sweden,India, Finland, is your go-to partner for startup development and innovative web design solutions. Our expert team specializes in crafting cutting-edge software tailored to meet the unique needs of startups and established enterprises alike. From conceptualization to execution, we offer comprehensive services including web and mobile app development, UI/UX design, and ongoing software maintenance. Ready to elevate your business? Contact CyanicLab today and let us propel your vision to success with our top-notch IT solutions.
How Recreation Management Software Can Streamline Your Operations.pptxwottaspaceseo
Recreation management software streamlines operations by automating key tasks such as scheduling, registration, and payment processing, reducing manual workload and errors. It provides centralized management of facilities, classes, and events, ensuring efficient resource allocation and facility usage. The software offers user-friendly online portals for easy access to bookings and program information, enhancing customer experience. Real-time reporting and data analytics deliver insights into attendance and preferences, aiding in strategic decision-making. Additionally, effective communication tools keep participants and staff informed with timely updates. Overall, recreation management software enhances efficiency, improves service delivery, and boosts customer satisfaction.
Accelerate Enterprise Software Engineering with PlatformlessWSO2
Key takeaways:
Challenges of building platforms and the benefits of platformless.
Key principles of platformless, including API-first, cloud-native middleware, platform engineering, and developer experience.
How Choreo enables the platformless experience.
How key concepts like application architecture, domain-driven design, zero trust, and cell-based architecture are inherently a part of Choreo.
Demo of an end-to-end app built and deployed on Choreo.
Globus Connect Server Deep Dive - GlobusWorld 2024Globus
We explore the Globus Connect Server (GCS) architecture and experiment with advanced configuration options and use cases. This content is targeted at system administrators who are familiar with GCS and currently operate—or are planning to operate—broader deployments at their institution.
Check out the webinar slides to learn more about how XfilesPro transforms Salesforce document management by leveraging its world-class applications. For more details, please connect with sales@xfilespro.com
If you want to watch the on-demand webinar, please click here: https://www.xfilespro.com/webinars/salesforce-document-management-2-0-smarter-faster-better/
Listen to the keynote address and hear about the latest developments from Rachana Ananthakrishnan and Ian Foster who review the updates to the Globus Platform and Service, and the relevance of Globus to the scientific community as an automation platform to accelerate scientific discovery.
Providing Globus Services to Users of JASMIN for Environmental Data AnalysisGlobus
JASMIN is the UK’s high-performance data analysis platform for environmental science, operated by STFC on behalf of the UK Natural Environment Research Council (NERC). In addition to its role in hosting the CEDA Archive (NERC’s long-term repository for climate, atmospheric science & Earth observation data in the UK), JASMIN provides a collaborative platform to a community of around 2,000 scientists in the UK and beyond, providing nearly 400 environmental science projects with working space, compute resources and tools to facilitate their work. High-performance data transfer into and out of JASMIN has always been a key feature, with many scientists bringing model outputs from supercomputers elsewhere in the UK, to analyse against observational or other model data in the CEDA Archive. A growing number of JASMIN users are now realising the benefits of using the Globus service to provide reliable and efficient data movement and other tasks in this and other contexts. Further use cases involve long-distance (intercontinental) transfers to and from JASMIN, and collecting results from a mobile atmospheric radar system, pushing data to JASMIN via a lightweight Globus deployment. We provide details of how Globus fits into our current infrastructure, our experience of the recent migration to GCSv5.4, and of our interest in developing use of the wider ecosystem of Globus services for the benefit of our user community.
Designing for Privacy in Amazon Web ServicesKrzysztofKkol1
Data privacy is one of the most critical issues that businesses face. This presentation shares insights on the principles and best practices for ensuring the resilience and security of your workload.
Drawing on a real-life project from the HR industry, the various challenges will be demonstrated: data protection, self-healing, business continuity, security, and transparency of data processing. This systematized approach allowed to create a secure AWS cloud infrastructure that not only met strict compliance rules but also exceeded the client's expectations.
Modern design is crucial in today's digital environment, and this is especially true for SharePoint intranets. The design of these digital hubs is critical to user engagement and productivity enhancement. They are the cornerstone of internal collaboration and interaction within enterprises.
How Does XfilesPro Ensure Security While Sharing Documents in Salesforce?XfilesPro
Worried about document security while sharing them in Salesforce? Fret no more! Here are the top-notch security standards XfilesPro upholds to ensure strong security for your Salesforce documents while sharing with internal or external people.
To learn more, read the blog: https://www.xfilespro.com/how-does-xfilespro-make-document-sharing-secure-and-seamless-in-salesforce/
OpenFOAM solver for Helmholtz equation, helmholtzFoam / helmholtzBubbleFoamtakuyayamamoto1800
In this slide, we show the simulation example and the way to compile this solver.
In this solver, the Helmholtz equation can be solved by helmholtzFoam. Also, the Helmholtz equation with uniformly dispersed bubbles can be simulated by helmholtzBubbleFoam.
Software Engineering, Software Consulting, Tech Lead.
Spring Boot, Spring Cloud, Spring Core, Spring JDBC, Spring Security,
Spring Transaction, Spring MVC,
Log4j, REST/SOAP WEB-SERVICES.
Climate Science Flows: Enabling Petabyte-Scale Climate Analysis with the Eart...Globus
The Earth System Grid Federation (ESGF) is a global network of data servers that archives and distributes the planet’s largest collection of Earth system model output for thousands of climate and environmental scientists worldwide. Many of these petabyte-scale data archives are located in proximity to large high-performance computing (HPC) or cloud computing resources, but the primary workflow for data users consists of transferring data, and applying computations on a different system. As a part of the ESGF 2.0 US project (funded by the United States Department of Energy Office of Science), we developed pre-defined data workflows, which can be run on-demand, capable of applying many data reduction and data analysis to the large ESGF data archives, transferring only the resultant analysis (ex. visualizations, smaller data files). In this talk, we will showcase a few of these workflows, highlighting how Globus Flows can be used for petabyte-scale climate analysis.
Into the Box Keynote Day 2: Unveiling amazing updates and announcements for modern CFML developers! Get ready for exciting releases and updates on Ortus tools and products. Stay tuned for cutting-edge innovations designed to boost your productivity.
Paketo Buildpacks : la meilleure façon de construire des images OCI? DevopsDa...Anthony Dahanne
Les Buildpacks existent depuis plus de 10 ans ! D’abord, ils étaient utilisés pour détecter et construire une application avant de la déployer sur certains PaaS. Ensuite, nous avons pu créer des images Docker (OCI) avec leur dernière génération, les Cloud Native Buildpacks (CNCF en incubation). Sont-ils une bonne alternative au Dockerfile ? Que sont les buildpacks Paketo ? Quelles communautés les soutiennent et comment ?
Venez le découvrir lors de cette session ignite
6. h0 := 0x6a09e667
h1 := 0xbb67ae85
h2 := 0x3c6ef372
h3 := 0xa54ff53a
h4 := 0x510e527f
h5 := 0x9b05688c
h6 := 0x1f83d9ab
h7 := 0x5be0cd19
s0 := (a rightrotate 2) xor (a rightrotate 13) xor(a rightrotate 22)
s1 := (e rightrotate 6) xor (e rightrotate 11) xor(e rightrotate 25)
maj:= (a and b) xor (a and c) xor(b and c)
ch := (e and f) xor ((not e) and g)
t1 := h + s1 + ch + k[i] + w[i]
t2 := s0 + maj
Initialize variables
h：= g
g：= f
f：= e
e：= d + t1
d：= c
c：= b
b：= a
a：= t1 + t2
h0：= h0 + a
h1：= h1 + b
h2：= h2 + c
h3：= h3 + d
h4：= h4 + e
h5：= h5 + f
h6：= h6 + g
h7：= h7 + h
t1
t2
SHA
38. Ethereum address Random
PrivateKey (256bit)
SECP256k1
PublicKey (512bit)
sha3.keccak_256()
sha3.keccak(256bit)
頭:0x+sha末40位(hex)
ETH address(160bit)
One
Two
Three
Four
./ethereum-wallet-generator.py
Private key:
eff415edb6331f4f67bdb7f1ecc639da9bcc0550b100bb275c7b5
b21ce3a7804
Public key:
d6dd5241c03bf418b333c256057ee878c34975d6abda075d58e
4b9780f4a8659fcc096b6ad763d8e5914f7daa0b7351398b1eb6
458e95ac41a2711a0651f3fc6
Address: 0x4206f95fc533483fae4687b86c1d0a0088e3cd48
41. 參考文獻
• Vasek, Marie, et al. "The Bitcoin brain drain: a short paper on the use and abuse of bitcoin brain wallets."
Financial Cryptography and Data Security, Lecture Notes in Computer Science. Springer (2016).
• Gilbert, Henri, and Helena Handschuh. "Security analysis of SHA-256 and sisters." International workshop
on selected areas in cryptography. Springer, Berlin, Heidelberg, 2003.
• Chen, Po-Wei, Bo-Sian Jiang, and Chia-Hui Wang. "Blockchain-based payment collection supervision
system using pervasive Bitcoin digital wallet." 2017 IEEE 13th International Conference on Wireless and
Mobile Computing, Networking and Communications (WiMob). IEEE, 2017.
• 江柏憲、陳伯韋、王家輝、何建明,”匿名加密貨幣與實名商家交易的有效行動支付監督平臺之建置與實作-以比特
幣為例,” TANET2017 臺灣網際網路研討會, Oct. 25-27, 2017
• http://programmermagazine.github.io/201401/htm/message2.html
