PPT-Dissecting Bitcoin Architecture and Security

Bitcoin Technology is Game Changer Bitcoin bitcoin Decentralized distributed Censorship Resistant Permissionless Public transactions Immutable record Standardize way to talk money. Thomas Holenstein. ITS Science . Colloquium. , Nov 6, 2014. Goal of this Talk. Part I: What is Bitcoin?. Approach: technical. Requires digital signatures and random oracles.. Goal of this Talk. Part II: Bitcoin research. 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. Digital Currency. Chaum’s. ideas in the 1980’s. 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 you’ve never heard of have attempted digital cash. Bitcoin . Technology is Game . Changer. Bitcoin != bitcoin. . Decentralized != distributed. Censorship Resistant. Permission-less. Public transactions. Immutable . record. Standardize way to talk money. 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. אביב זהר. ביה"ס להנדסה ולמדעי המחשב . האוניברסיטה העברית. (מבוסס על עבודה משותפת עם יונתן . סומפולינסקי. ). avivz@cs.huji.ac.il. 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 Japan quickly and efficiently. Download it now. Visit: https://www.smartbitcoininvestments.com/buy-bitcoin-in-japan/ Use our guide to find all of the supported exchanges and bitcoin ATMs within Florida quickly and efficiently. Download it now. Visit: https://www.smartbitcoininvestments.com/buy-bitcoin-in-florida/ Use our guide to find all of the supported exchanges and bitcoin ATMs within Nevada quickly and efficiently. Download it now. Visit: https://www.smartbitcoininvestments.com/buy-bitcoin-in-nevada/ Sharath Chandra Ram. sharath@cis-india.org. The Byzantine General’s Problem –. Fault/. MisTrust. Tolerance in Distributed Computation. Bitcoin. /. Cryptocurrency. in many ways is analogous . to the Internet of .