This document discusses the recent disruption in the bitcoin market due to transaction malleability issues at major bitcoin exchanges Mt. Gox and Bitstamp. It explains that transaction malleability refers to an inherent flaw in the bitcoin protocol that allows the transaction ID of a bitcoin transfer to be altered, causing problems for exchanges trying to keep track of withdrawals and deposits. While Mt. Gox blamed transaction malleability for suspending withdrawals, core bitcoin developers said the real issue was how Mt. Gox handled transaction IDs and customer support. The document concludes that regulation of bitcoin and virtual currencies is inevitable as these emerging technologies are exploited.
Bit Coin is the only one of the global online currency. This Presentation mainly about on bitcoin works,how created bitcoin,who is control this,exchanges of this coins,who is established this type of coin.
Bit Coin is the only one of the global online currency. This Presentation mainly about on bitcoin works,how created bitcoin,who is control this,exchanges of this coins,who is established this type of coin.
Anonymous E Cash Transaction is using Bitcoinijtsrd
Crypto currency is variety of digital and virtual currency on a technology is understood as Blockchain. Bitcoin is understood as peer to peer payment network. Bitcoin victimization payment dealing not needed central authority permission. Here all managing and validatory dealing anonymously payment network system. Bitcoin shows new ways that E cash dealing system. E cash send directly to one user to second user. While not interrupted by the another user. Here even have quicker and minimum fees to transfer e cash. Exploitation Bitcoin all the transaction cryptograpically secured. Bitcoin not provide very safe privacy guarantees, payment communication are saved in a public decentralized ledger. Sanket Subhash Mane "Anonymous E-Cash Transaction is using Bitcoin" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-3 , April 2020, URL: https://www.ijtsrd.com/papers/ijtsrd30222.pdf Paper Url :https://www.ijtsrd.com/computer-science/other/30222/anonymous-ecash-transaction-is-using-bitcoin/sanket-subhash-mane
More info: https://blockchainhub.net/
Blockchain for Beginners: Blockchain history, state of development, outlook & current challenges #bitcoin #ethereum #smartcontracts
Introduction to Bitcoins and CryptocurrencyUtkarsh Gupta
An approach to introduce Bitcoins and Cryptocurrencies which are believed to change the way we are going to transact in terms of money with one another.
The regulation for any new area is better than its ban. Shying away from framing regulation to deal with a new technology does not prove the efficiency of the Government.
The five-year-old digital currency is increasingly being adopted by brick-and mortar businesses and professionals alike. Companies like bakeries, pet boutiques, wine stores, car dealers, florists, boutiques and professionals including dentists and other medical professionals, technical experts and more are using it like cash. In this program, Chris discusses about his experience using Bitcoin in his business, how it has grown exponentially and continues to grow, how small businesses and individuals can use it in there business to increase revenue, drive ecommerce and grow your bottom line. In this session Chris will discuss what Bitcoin is and answer the following questions:
• Why does Bitcoin matter? And why now?
• How do you get started?
• Where did Bitcoin come from?
• How does Bitcoin work?
• What does Bitcoin mean for the future of the Internet?
and much more!
There is increasing interest in the potential impact of Blockchain globally, across the business world. Blockchain is transforming data storage, security, digital property management, transactions in a variety of forms, and much, much, more. And the impact will be felt across a number of industries, including manufacturing, insurance, healthcare, retail, logistics, and more.
We believe Blockchain presents a unique opportunity for enterprises to leverage a revolutionary new technology and redefine how they function. The Blockchain Landscape Report 2019 by [X]cubeLABS discusses everything Blockchain ranging from its history, mechanism, and industry-wide adoption to its future potential.
Blockchain technology and applications from a financial perspectiveVittorio Zinetti
This article aims at explaining the blockchain opportunity for the financial industry. First the fundamentals of technology is introduced, then possible application of blockchain to three financial use cases are presented.
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
A SNAPSHOT ON THE NEW DIGITAL CURRENCY: BITCOINVARUN KESAVAN
Bitcoin is a cryptocurrency and worldwide payment system.[8]:3 It is the first decentralized digital currency – the system works without a central repository or single administrator.[8]:1[9] The network is peer-to-peer and transactions take place between users directly through the use of cryptography, without an intermediary.[8]:4 These transactions are verified by network nodes and recorded in a public distributed ledger called a blockchain. Bitcoin was invented by an unknown person or group of people under the name Satoshi Nakamoto[10] and released as open-source software in 2009.[11]
Bitcoins are created as a reward for a process known as mining. They can be exchanged for other currencies,[12]products, and services. As of February 2015, over 100,000 merchants and vendors accepted bitcoin as payment.[13]Research produced by Cambridge University estimates that in 2017, there are 2.9 to 5.8 million unique users using a cryptocurrency wallet, most of them using bitcoin.
Anonymous E Cash Transaction is using Bitcoinijtsrd
Crypto currency is variety of digital and virtual currency on a technology is understood as Blockchain. Bitcoin is understood as peer to peer payment network. Bitcoin victimization payment dealing not needed central authority permission. Here all managing and validatory dealing anonymously payment network system. Bitcoin shows new ways that E cash dealing system. E cash send directly to one user to second user. While not interrupted by the another user. Here even have quicker and minimum fees to transfer e cash. Exploitation Bitcoin all the transaction cryptograpically secured. Bitcoin not provide very safe privacy guarantees, payment communication are saved in a public decentralized ledger. Sanket Subhash Mane "Anonymous E-Cash Transaction is using Bitcoin" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-3 , April 2020, URL: https://www.ijtsrd.com/papers/ijtsrd30222.pdf Paper Url :https://www.ijtsrd.com/computer-science/other/30222/anonymous-ecash-transaction-is-using-bitcoin/sanket-subhash-mane
More info: https://blockchainhub.net/
Blockchain for Beginners: Blockchain history, state of development, outlook & current challenges #bitcoin #ethereum #smartcontracts
Introduction to Bitcoins and CryptocurrencyUtkarsh Gupta
An approach to introduce Bitcoins and Cryptocurrencies which are believed to change the way we are going to transact in terms of money with one another.
The regulation for any new area is better than its ban. Shying away from framing regulation to deal with a new technology does not prove the efficiency of the Government.
The five-year-old digital currency is increasingly being adopted by brick-and mortar businesses and professionals alike. Companies like bakeries, pet boutiques, wine stores, car dealers, florists, boutiques and professionals including dentists and other medical professionals, technical experts and more are using it like cash. In this program, Chris discusses about his experience using Bitcoin in his business, how it has grown exponentially and continues to grow, how small businesses and individuals can use it in there business to increase revenue, drive ecommerce and grow your bottom line. In this session Chris will discuss what Bitcoin is and answer the following questions:
• Why does Bitcoin matter? And why now?
• How do you get started?
• Where did Bitcoin come from?
• How does Bitcoin work?
• What does Bitcoin mean for the future of the Internet?
and much more!
There is increasing interest in the potential impact of Blockchain globally, across the business world. Blockchain is transforming data storage, security, digital property management, transactions in a variety of forms, and much, much, more. And the impact will be felt across a number of industries, including manufacturing, insurance, healthcare, retail, logistics, and more.
We believe Blockchain presents a unique opportunity for enterprises to leverage a revolutionary new technology and redefine how they function. The Blockchain Landscape Report 2019 by [X]cubeLABS discusses everything Blockchain ranging from its history, mechanism, and industry-wide adoption to its future potential.
Blockchain technology and applications from a financial perspectiveVittorio Zinetti
This article aims at explaining the blockchain opportunity for the financial industry. First the fundamentals of technology is introduced, then possible application of blockchain to three financial use cases are presented.
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
A SNAPSHOT ON THE NEW DIGITAL CURRENCY: BITCOINVARUN KESAVAN
Bitcoin is a cryptocurrency and worldwide payment system.[8]:3 It is the first decentralized digital currency – the system works without a central repository or single administrator.[8]:1[9] The network is peer-to-peer and transactions take place between users directly through the use of cryptography, without an intermediary.[8]:4 These transactions are verified by network nodes and recorded in a public distributed ledger called a blockchain. Bitcoin was invented by an unknown person or group of people under the name Satoshi Nakamoto[10] and released as open-source software in 2009.[11]
Bitcoins are created as a reward for a process known as mining. They can be exchanged for other currencies,[12]products, and services. As of February 2015, over 100,000 merchants and vendors accepted bitcoin as payment.[13]Research produced by Cambridge University estimates that in 2017, there are 2.9 to 5.8 million unique users using a cryptocurrency wallet, most of them using bitcoin.
Confused by some of the terms used on CoinDesk? Here you will find a complete bitcoin 101 that will help you to understand digital currency by explaining commonly used terms and their meanings.
Bitcoin is a digital, decentralized, partially anonymous currency, not backed by any government or other legal entity, and not redeemable for gold or other commodity. It relies on peer-to-peer networking and cryptography to maintain its integrity. A purely peer-to-peer version of electronic cash would allow online payments to be sent directly from one party to another without going through a financial institution. Digital signatures provide part of the solution, but the main benefits are lost if a trusted third party is still required to prevent double-spending.
Bitcoin is a cryptocurrency. It is a decentralized payment system and kept alive due to the technology called Blockchain. These are peer-to-peer transactions. These transactions are verified by using a cryptography technology bank. Chain technology keeps the record of the distributed ledger. Bitcoins can be earned as a reward through mining. This currency can be convertible into other currencies, products, and services. Bitcoin has been emerging as a famous digital currency and popularity all over for quick transition. Moreover, bitcoin will be an economic asset because it has profitable results. The purpose of this research study is to explain the complete working of bitcoins technology, applications, and research challenges to be addressed, and the current future international market scope of Bitcoin technology.
Bitcoin was proposed by Satoshi Nakamoto on 31st Oct 2008. It is the pseudonym used by an individual or a collective group of people. In January 2009, the First open-source Bitcoin client was released and the bitcoin network came into existence. Satoshi Nakamoto is an inventor of bitcoin, and blockchain technology. All through it’s a false name. This is how he introduced himself to the internet. Unfortunately, many people think that because Satoshi Nakamoto has invented Bitcoin and the Blockchain technology, he is the owner of those too. The reality is that Satoshi Nakamoto has neither control over the Blockchain nor bitcoin. Therefore, it really doesn’t matter who Satoshi Nakamoto is.
Blockchain is a technology, and its first function was on the platform named bitcoin. Bitcoin is Blockchain. However, Bitcoin itself is only a cryptocurrency that is capable of replacing fiduciary currency. Nevertheless, not that many people will like the idea at first.
Cryptocurrency Alliance Super PAC-The Global Emergence of Cryptocurrencies an...Casey Botticello
The Cryptocurrency Alliance Super PAC-The Global Emergence of Cryptocurrencies and Blockchain Technology. This presentation provides an overview of the origins, technology, and applications of cryptocurrency and blockchain technology. Presented by Casey Botticello, President of The Cryptocurrency Alliance Super PAC.
For more information about The Cryptocurrency Alliance Super PAC and to get the latest crypto updates, go to: www.cryptocurrencyalliance.org
To get exclusive access to business content, from Casey Botticello, go to: www.caseybotticello.com
Social Media/Content Links:
Super PAC: www.cryptocurrencyalliance.org
Projects: www.caseybotticello.com
Medium Articles: https://medium.com/@caseybotticello
LinkedIn: https://www.linkedin.com/in/caseybotticello
Twitter: https://twitter.com/caseybotticello
Private Equity Investments: www.botticello.com
Bitcoin Technology” Bitcoin is an innovative technology that offers several benefits, such as fast transaction speeds, low costs, and the elimination of the need for a third-party intermediary to process transactions. Unfortunately, BitCoin has faced resistance from regulators because the technology has been used for nefarious purposes, including online drug purchases and Ponzi schemes. This note provides a basic explanation of how BitCoin works and is currently regulated on federal and state levels. This note argues that BitCoin should not be forced into old regulatory frameworks that do not adequately balance security concerns with the benefits of BitCoin. BitCoin should not be regulated at the federal level. Instead, state regulations should focus on BitCoin providers that can unilaterally transfer or block transfers of BitCoin on behalf of users. State regulators should require such providers to register with their given states, maintain adequate books and records, implement advanced cyber security standards, conduct audits of their operations, and submit reports to state regulators. In crafting these regulations, regulators should keep in mind that vague or poorly drafted regulations will chill innovation. A Bitcoin would allow online payments to be sent directly from one party to another without going through a financial institution. Digital signatures provide part of the solution, but the main benefits are lost if a trusted third party is still required to prevent double-spending. We propose a solution to the double-spending problem using a peer-to-peer network.
Bitcoin - First Blockchain Implementation -- What is it? How can it be used? ...Prashant Shahi
This slide briefly explains what Bitcoin is, how can it be used, how it works and their limitations. This slide answers Often Asked Questions about Bitcoin !!
This seminar discus about BITCOIN TECHNOLOGY. its EVOlUTION,TERMS USED IN BITCOIN,MINING,AQUIRING, BITCOIN, HOW TO STORE BITCOINS, TYPES OF WALLET, HOW BITCOIN ACTUALLY WORKS, TRANSACTION .
Last Wednesday I delivered a speech titled “Success” to an enthusiastic group at the Centre of Education and Training in Brampton, Ontario. I opened my speech with the following quote:
“The future belongs to those who believe in the beauty of their dreams.” ― Eleanor Roosevelt
And then I said success belongs to those:
a. with a clear vision and specific goals
b. willing to lose fear, willing take action and have a fierce desire and determination to succeed
c. who foster positive and meaningful relationships
Today I have decided to share with you a bit of my speech.
There are several factors that are the right foundation for success. Today I share three from my experience and hope to hear from you about other factors that you consider the key foundation for success.
One of my goals for 2014 is become a professional speaker. Today I share a little about my progress and success. I hope my story will be inspire you to accomplishing your dreams.
Today I share a little about caring for others. Care, compassion and kindness were virtues imparted on me by mother. The ALS Ice Bucket Challenge provided me with a vehicle to share my mother’s legacy of caring with others.
Today I share some of my experience about being a small business owner. I talk about risks and uncertainties, being prepared for new opportunities and about surrounding yourself with a delightful team.
My daughter just returned from a recent trip to New Orleans to explore opportunities to continue her post-secondary training to become a pastry chef. Today I share some my text messages to her with the hope that you will share in the excitement of my wife and I as well as you may be inspired to dream and take actions to fulfill your goals.
Today I share with you my experiences of simple acts of kindness last Friday. I believe that through simple acts of kindness we are able to remain hopeful in humanity during period of despair and sadness.
To day I share my thoughts on great expectations. In this blog I share a little twist of fate on how agreeing to do a presentation on Bitcoin for one of our Top Banks may blossom into much more than I expected. Great expectations for achieving your dreams is about the power of believing in yourself. It is about walking away from naysayers and not allowing your fears to stop you.
Today I used my blog post on McKenzie's Voice to launch a campaign to help the homeless and hungry as I share my thoughts on five key attributes of effective and extraordinary leaders. My goal is to raise $2,000 for Regeneration’s Coldest Night of the Year Campaign by February 22, 2014. Commencing today, Monday, February 3, 2014 I will walk 2K daily, 5K on Saturday and Sundays and on February 22, 2014 I will walk and run 10K. However, I want to do a little more to test the attributes of effective and extraordinary leadership. To this end, I am committing to spend the entire night of February 22, 2014 outdoors in the cold in solidarity with the homeless.
Today I share my thoughts with you about discovering your talents in 2014. Discovering your talents does not mean this how you will make a living. It is about making time to do the things that you are good at doing and most importantly doing the things that make you feel fulfilled, purposeful and authentic.
Premium MEAN Stack Development Solutions for Modern BusinessesSynapseIndia
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Attending a job Interview for B1 and B2 Englsih learnersErika906060
It is a sample of an interview for a business english class for pre-intermediate and intermediate english students with emphasis on the speking ability.
Falcon stands out as a top-tier P2P Invoice Discounting platform in India, bridging esteemed blue-chip companies and eager investors. Our goal is to transform the investment landscape in India by establishing a comprehensive destination for borrowers and investors with diverse profiles and needs, all while minimizing risk. What sets Falcon apart is the elimination of intermediaries such as commercial banks and depository institutions, allowing investors to enjoy higher yields.
"𝑩𝑬𝑮𝑼𝑵 𝑾𝑰𝑻𝑯 𝑻𝑱 𝑰𝑺 𝑯𝑨𝑳𝑭 𝑫𝑶𝑵𝑬"
𝐓𝐉 𝐂𝐨𝐦𝐬 (𝐓𝐉 𝐂𝐨𝐦𝐦𝐮𝐧𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬) is a professional event agency that includes experts in the event-organizing market in Vietnam, Korea, and ASEAN countries. We provide unlimited types of events from Music concerts, Fan meetings, and Culture festivals to Corporate events, Internal company events, Golf tournaments, MICE events, and Exhibitions.
𝐓𝐉 𝐂𝐨𝐦𝐬 provides unlimited package services including such as Event organizing, Event planning, Event production, Manpower, PR marketing, Design 2D/3D, VIP protocols, Interpreter agency, etc.
Sports events - Golf competitions/billiards competitions/company sports events: dynamic and challenging
⭐ 𝐅𝐞𝐚𝐭𝐮𝐫𝐞𝐝 𝐩𝐫𝐨𝐣𝐞𝐜𝐭𝐬:
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"𝐄𝐯𝐞𝐫𝐲 𝐞𝐯𝐞𝐧𝐭 𝐢𝐬 𝐚 𝐬𝐭𝐨𝐫𝐲, 𝐚 𝐬𝐩𝐞𝐜𝐢𝐚𝐥 𝐣𝐨𝐮𝐫𝐧𝐞𝐲. 𝐖𝐞 𝐚𝐥𝐰𝐚𝐲𝐬 𝐛𝐞𝐥𝐢𝐞𝐯𝐞 𝐭𝐡𝐚𝐭 𝐬𝐡𝐨𝐫𝐭𝐥𝐲 𝐲𝐨𝐮 𝐰𝐢𝐥𝐥 𝐛𝐞 𝐚 𝐩𝐚𝐫𝐭 𝐨𝐟 𝐨𝐮𝐫 𝐬𝐭𝐨𝐫𝐢𝐞𝐬."
Explore our most comprehensive guide on lookback analysis at SafePaaS, covering access governance and how it can transform modern ERP audits. Browse now!
[Note: This is a partial preview. To download this presentation, visit:
https://www.oeconsulting.com.sg/training-presentations]
Sustainability has become an increasingly critical topic as the world recognizes the need to protect our planet and its resources for future generations. Sustainability means meeting our current needs without compromising the ability of future generations to meet theirs. It involves long-term planning and consideration of the consequences of our actions. The goal is to create strategies that ensure the long-term viability of People, Planet, and Profit.
Leading companies such as Nike, Toyota, and Siemens are prioritizing sustainable innovation in their business models, setting an example for others to follow. In this Sustainability training presentation, you will learn key concepts, principles, and practices of sustainability applicable across industries. This training aims to create awareness and educate employees, senior executives, consultants, and other key stakeholders, including investors, policymakers, and supply chain partners, on the importance and implementation of sustainability.
LEARNING OBJECTIVES
1. Develop a comprehensive understanding of the fundamental principles and concepts that form the foundation of sustainability within corporate environments.
2. Explore the sustainability implementation model, focusing on effective measures and reporting strategies to track and communicate sustainability efforts.
3. Identify and define best practices and critical success factors essential for achieving sustainability goals within organizations.
CONTENTS
1. Introduction and Key Concepts of Sustainability
2. Principles and Practices of Sustainability
3. Measures and Reporting in Sustainability
4. Sustainability Implementation & Best Practices
To download the complete presentation, visit: https://www.oeconsulting.com.sg/training-presentations
RMD24 | Debunking the non-endemic revenue myth Marvin Vacquier Droop | First ...BBPMedia1
Marvin neemt je in deze presentatie mee in de voordelen van non-endemic advertising op retail media netwerken. Hij brengt ook de uitdagingen in beeld die de markt op dit moment heeft op het gebied van retail media voor niet-leveranciers.
Retail media wordt gezien als het nieuwe advertising-medium en ook mediabureaus richten massaal retail media-afdelingen op. Merken die niet in de betreffende winkel liggen staan ook nog niet in de rij om op de retail media netwerken te adverteren. Marvin belicht de uitdagingen die er zijn om echt aansluiting te vinden op die markt van non-endemic advertising.
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Improving profitability for small businessBen Wann
In this comprehensive presentation, we will explore strategies and practical tips for enhancing profitability in small businesses. Tailored to meet the unique challenges faced by small enterprises, this session covers various aspects that directly impact the bottom line. Attendees will learn how to optimize operational efficiency, manage expenses, and increase revenue through innovative marketing and customer engagement techniques.
The world of search engine optimization (SEO) is buzzing with discussions after Google confirmed that around 2,500 leaked internal documents related to its Search feature are indeed authentic. The revelation has sparked significant concerns within the SEO community. The leaked documents were initially reported by SEO experts Rand Fishkin and Mike King, igniting widespread analysis and discourse. For More Info:- https://news.arihantwebtech.com/search-disrupted-googles-leaked-documents-rock-the-seo-world/
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5. Bitcoin Market Disruption
Denial of services attack (DOSC)
Suspended withdrawals
Inability to handle the volume of traffic created by
customers
Inherent flaw with the way bitcoin transactions
work
Resulted in a plunge in bitcoin rates across the
globe.
6. A graph of the transactions and prices of bitcoin on the virtual currency exchange
MtGox. Courtesy MtGox
7. Who Is Really At Fault?
MtGox Blames Bitcoin For Withdrawal
Suspension
Blamed the bitcoin source code for the
temporary stoppage of withdrawal power on its
site.
The protocol for the currency has an inherent
problem
The problem identified is not limited to affected
exchanges
Affects all transactions where Bitcoins are being
sent to a third party
8. Who Is Really At Fault?
Transaction malleability has been around for a
while
It was first identified in the bitcoin code in 2011.
This fault in the code, according to the bitcoin
exchange, is why they were forced to suspend
all withdrawal transactions since late last week.
“MtGox has detected unusual activity on its
bitcoin wallets and performed investigations
during the past weeks. This confirmed the
presence of transactions which need to be
examined more closely,” MtGox stated.
9. Who Is Really At Fault?
Core Developers Say Otherwise:
The Bitcoin Foundation
a coalition of bitcoin businesses intent on propagating the virtual
currency
“The issues that MtGox has been experiencing are
due to an unfortunate interaction between MtGox’s
implementation of their highly customized wallet
software, their customer support procedures, and
their unpreparedness for transaction malleability, a
technical detail that allows changes to the way
transactions are identified,” Gavin Andresen, chief
scientist at the Bitcoin Foundation who is also a
bitcoin core developer, said.
10. How Does Bitcoin Work?
From a user perspective:
◦ Bitcoin is nothing more than a mobile app or computer program
◦ Provides a personal Bitcoin wallet
◦ Allows a user to send and receive bitcoins with them.
Behind the scenes:
The Bitcoin network is sharing a public ledger called the "block chain".
◦ This ledger contains every transaction ever processed,
◦ Allowing a user's computer to verify the validity of each transaction.
The authenticity of each transaction is protected
◦ By digital signatures corresponding to the sending addresses,
◦ Allowing all users to have full control over sending bitcoins from their own Bitcoin
addresses.
11. How Does Bitcoin Work?
In addition, anyone can process transactions using the computing power of specialized hardware and earn a reward in
bitcoins for this service.
This is often called "mining".
Approximately 11 million Bitcoin have been mined, 21 million Bitcoin in total.
“Miners” – supply Bitcoin network with computing power needed to maintain the security of the block chain (a
distributed technology that acts as Bitcoin’s ledger)
Every single Bitcoin carries the entire history of the transactions it has undergone, and any transfer from one owner to
another becomes part of the code
Bitcoin is stored in such a way that the new owner is the only person allowed to spend it.
Miners are rewarded with “blocks” of issued bitcoins (a “block” currently contains 25 bitcoins); this is how currency is
issued
Price of Bitcoin fluctuates wildly. As of April 23, 2013, 1 bitcoin is worth $130 USD
12. How Difficult Is it To Make Bitcoin
Payment?
Bitcoin payments are easier to make than debit or credit card purchases
Can be received without a merchant account.
Payments are made from a wallet application, either on your computer or
smartphone, by entering the recipient's address, the payment amount, and pressing
send.
To make it easier to enter a recipient's address, many wallets can obtain the address
by scanning a QR code or touching two phones together with NFC technology.
13. Bitcoin Block Chain
Acts like a giant general ledger for the whole of the bitcoin network
It keeps records of which bitcoin addresses sent funds to other bitcoin addresses,
and when.
This gives it a complete record of how many bitcoins can be attributed to which
addresses on the network at any one time.
When a bitcoin transaction is made, it includes information such as the addresses
that the bitcoins came from (the inputs),
Where they are going (the outputs), the amounts transferred, and
Which addresses sent those funds to the sender’s address.
14. Bitcoin Block Chain
Bitcoin can also be seen as the most prominent triple entry bookkeeping system in
existence.
◦
Momentum accounting and triple-entry bookkeeping is an alternative accountancy system developed by Yuji
Ijiri
◦
Changes in balances are the recognized events.
◦
E.g. an acceleration in revenue earning, such as a $1,000 per period increase of revenues from $10,000 per
month to $11,000 per month, is a recordable event that would require three entries to implement.
15. Transaction ID (TX ID)
Hashing
Each transaction must be uniquely identified - Transaction ID (TX ID)
◦
For reference in the block chain
Produced by taking the information in the transaction, and
Running it through a hash function
◦
A mathematical procedure that takes different pieces of data and
◦
Combines them to produce a shorter piece of information, known as a hash.
Component of Transaction Hash
The user’s digital signature
Proves that the transaction came from them
Allows user to digitally ‘sign’ the transaction.
16. Transaction ID (TX ID)
Key qualities of a hashing function
It is impossible to tell what the original information was simply by looking at the
hash
It is also impossible to predict what the hash will be, based on the pieces of
information that you start with.
If any small detail changes in any of those pieces of data, it will change the hash in a
completely unpredictable way.
Benefits of TX ID
Hashing makes transaction IDs practically impossible to spoof.
Each transaction should only have one possible hash.
You can prove that a transaction is valid by simply running all of the pieces of
information that made up that transaction through the hashing function, to check
that you get the same hash.
17. How does transaction malleability
work?
The user’s digital signatures used as part of the hash to ‘sign’ the
transaction are meant to be in a certain format.
That format wasn’t always properly checked.
This meant that a badly-formatted one could be introduced, and still
accepted.
Altering the signature in this way makes it possible to create different
hashes for the same transaction.
18. Conclusions
Bitcoin and other virtual currencies has given rise to emerging risks in
the global financial including being exploited by criminal elements.
The recent Bitcoin market disruption is one more reason why state
intervention in the form of formal regulations imminent.
Benjamin Lawsky, New York's financial services superintendent, said he
believes regulation could add credibility to the still nascent, unstable
currency.
Regulation is inevitable and imminent
19. Sources
•
Bradbury, Danny. “What the ‘Bitcoin Bug’ Means: A Guide to Transaction Malleability.” February 12, 2014.
http://www.coindesk.com/bitcoin-bug-guide-transaction-malleability/
•
Felten, Ed “Understanding Bitcoin’s transaction malleability problem.” February 12, 2014. https://freedomto-tinker.com/blog/felten/understanding-bitcoins-transaction-malleability-problem/
•
Fuller, Cameron. “MtGox Blames Bitcoin For Withdrawal Suspension, Core Developers Say Otherwise: Who Is
Really At Fault?” February 11 2014. http://www.ibtimes.com/mtgox-blames-bitcoin-withdrawal-suspension-coredevelopers-say-otherwise-who-really-fault-1554512
•
Matthew, Jerin. “Singapore's ItBit Capitalises on Transaction Malleability Issue at Other Bitcoin Exchanges.” February
17, 2014. http://www.ibtimes.co.uk/singapores-itbit-capitalises-transaction-malleability-issue-other-bitcoin-exchanges1436680
•
Neal, Ryan W. “Silk Road 2 Hacked: Entire Bitcoin Wallet Drained, $2.7 Million Stolen.” February 13 2014.
http://www.ibtimes.com/silk-road-2-hacked-entire-bitcoin-wallet-drained-27-million-stolen-1555433
•
https://bitcoin.org/en/faq