PPT-BITCOIN – 2014 John Black Spring 2014

Digital Currency Chaums ideas in the 1980s All ideas required a central bank or single point of trust Chaum started a company DigiCash in 1990 Bankrupt in 1998 Lots of other companies youve never heard of have attempted digital cash. most. pertinent aspects in a computer science perspective. Hugues Bersini . Jérémie Dubois-Lacoste. IRIDIA/ULB. Intro: My . three. . favourite. aspects. Distributed. – . Decentralized. – No . David Evans and Samee Zahur. Mining. Why do we need miners?. Conflicting Blocks. Consensus. Majority of hashing power has voted for transactions on longest chain. . It is costly to increase voting power. Cyryptocurrency Project Proposal - Spring 2015. SHA Use in Bitcoin. SHA256 used heavily as bitcoin’s underlying cryptographic hashing function. Two examples (of many) are its use in the Merkle tree hash, as well as the proof of work calculation. Barter. Goods *BECOME* Money. Acceptable. Durable. Portable. Scarce. Divisible. Recognizable. Gold Storage -> Paper Receipts. England, 17. th. Century. Safety for travelers. Charles I’s Royal Mint loan (1640). What is Bitcoin?. Digital currency created in 2009. Peer-to-peer technology with no central authority. No physical bitcoins; seen as property by IRS. Price is volatile . Uses blockchain technology. Anonymous. Brian Green. What is Bitcoin?. Online Transactions Require(d) a Third Party Intermediary. Paypal. , MasterCard, etc.. “Double-Spending Problem”. 2008 - . Bitcoin: A Peer-to-Peer Electronic Cash . Field. Purpose. Updated when …. Size (Words). Version. Block version. number. You upgrade. the software and it specifies a new version. 1. hashPrevBlock. 256-bit hash of the previous block header. Non Centralized, unbacked Mathematical Algorithm that is Digitally exchangeable over a peer to peer network. . What is Bitcoin / Crypto Currency ? . In ENGLISH!. Mathematical code that can be exchanged as money between trusted partners. . Bitcoin . Technology is Game . Changer. Bitcoin != bitcoin. . Decentralized != distributed. Censorship Resistant. Permission-less. Public transactions. Immutable . record. Standardize way to talk money. - . An Analysis of the Bitcoin Transaction Graph. Anil Gaihre. Yan Luo. Hang Liu. 12/15/18. University of Massachusetts Lowell. Outline. Introduction and Background. Anonymity Metrics. Macro Analysis. Use our guide to find all supported exchanges and bitcoin ATMs within the United States for your state and local region quickly and efficiently. Download it now. Visit: https://www.smartbitcoininvestments.com/buy-bitcoin-in-united-states/ Use our guide to find all of the supported exchanges and bitcoin ATMs within Hawaii quickly and efficiently. Download it now. Visit: https://www.smartbitcoininvestments.com/buy-bitcoin-in-hawaii/ Use our guide to find all of the supported exchanges and bitcoin ATMs within Massachusetts quickly and efficiently. Download it now. Visit: https://www.smartbitcoininvestments.com/buy-bitcoin-in-massachusetts/ The Benefits of Reading Books,Most people read to read and the benefits of reading are surplus. But what are the benefits of reading. Keep reading to find out how reading will help you and may even add years to your life!.The Benefits of Reading Books,What are the benefits of reading you ask? Down below we have listed some of the most common benefits and ones that you will definitely enjoy along with the new adventures provided by the novel you choose to read.,Exercise the Brain by Reading .When you read, your brain gets a workout. You have to remember the various characters, settings, plots and retain that information throughout the book. Your brain is doing a lot of work and you don’t even realize it. Which makes it the perfect exercise!