. bitcoin-schweiz.ch. Bitcoin-Grundlagenseminar, Dienstag Funktionsweise von Blockchain und Bitcoin
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1 . bitcoin-schweiz.ch. Bitcoin-Grundlagenseminar, Dienstag Funktionsweise von Blockchain und Bitcoin Bitcoin-Anwenderseminar, Dienstag, 31. Oktober 2017 Bitcoin annehmen, weiterleiten und aufbewahren. Die konkrete Anwendung verschiedener Apps, Sicherheitsaspekte Hinweis auf häufige Fehler Spekulation mit Bitcoin und weiteren Kryptowährungen Dienstag, 7. November 2017 Grundsätze der Spekulation mit Bitcoin, Handel mit Limiten Spekulationstechniken und Anwendung von Internet-Plattformen, Aufbewahrung und eingeschränkte Verfügung von Bitcoin bitcoin-schweiz.ch
2 . bitcoin-schweiz.ch. Bitcoin-Grundlagenseminar, Dienstag Funktionsweise von Blockchain und Bitcoin Terminologie Definition Bitcoin / Blockchain / Key / Wallets / Transactions Bitcoin Network, Mining, Live Demonstration Ideologie, Vorteile Starterkit bitcoin-schweiz.ch
3 . bitcoin-schweiz.ch. Terminologie, Zeichen, Logo Key Schlüssel Adresse Wallet Geldbörse Schlüsselbund BTC XBT Ƀ bitcoin-schweiz.ch
4 A Brief Introduction to Bitcoin and Blockchain The Revolution Will Not Be Centralized Walter Dey, Dr. sc. nat bitcoin-schweiz.ch
5 Agenda Bitcoin / Blockchain: Economic / Social / Technical We will cover the following technical topics What is Bitcoin / Blockchain Public Key Cryptography and Addresses Wallets Transactions Bitcoin Network Mining Live Demonstration Conclusion bitcoin-schweiz.ch
6 Bitcoin is the first Cryptocurrency
7 Which Bitcoin? bitcoin-schweiz.ch
8 Introduced conceptionally in 2008 in a white paper *) (Finance Crisis!) Network launches in 2009 History Business Case / Motivation Remittance Market (Western Union, PayPal,.) 2.5 Billions of unbanked people **) Bypass any Regulations (Governments, Finance Industry) Today mainly war of currencies (India, Venezuela, China, SA,.).. Not to forget: Criminals (Darknet, Silkroad,.) *) **)
9 Bitcoin is dead? Bubble? bitcoin-schweiz.ch
10 Bitcoin Bubble, Scam,..!?!
11
12 Blockchain / Bitcoin = Internet of Value Internet of Information TCP/IP = communication protocol Foundation of "Information Data Highway" 1st use case: Internet of Value Blockchain = Value Exchange Protocol *) **) Decentralizing Trust 1st use case: Bitcoin *) not to be confused with Private Blockchains **) Each cryptocurrency (eg. Ethereum, Litecoin) has it s own blockchain
13 Bitcoin Basics Bitcoin is A technology A protocol A network (the worlds largest distributed coming project) A currency (coins, tokens) A trusted ledger to record and manage the chain of title Settlement with a high degree of certainty The Bitcoin (payment system) is a public distributed peer-to-peer ledger used to transfer the ownership of bitcoins (the currency) Each Transaction on the blockchain is verified by all nodes in the network. If the majority of the network agree that a certain transaction is true, it is validated and a new Block is created and added on the top of the chain. Payments are sent between wallets, exchanges, and machine services with basically no fees Blockchain replaces the trusted 3rd party
14 Bitcoin Basics Bitcoin is NOT A company Centrally controlled Proprietary Localized or bound by jurisdictions in the conventional sense
15 The Blockchain / Bitcoin Ecosystem
16 Exchange (e.g. Bity Neuchatel, Kraken, SBB) Bitcoin am ATM kaufen 1) Paper-wallet: private key importieren auf persönliches Wallet 2) QR Code public-address zum aufladen und abfragen Geduld =============================== AML: ANTI-MONEY LAUNDERING KYC: KNOW YOUR CUSTOMER bitcoin-schweiz.ch
17 Wallet (eg. Bitcoin Full Node) bitcoin-schweiz.ch
18 Wallets Software Wallet-> Desktop (Electrum, Exodus), Mobile (Bread), Online (Blockchain.info) Hardware Wallet(Ledger Nano S, Trezor, KeepKey) Paper Wallet Wallet Storage (Private / Public Key s) Hot (connected via Internet to Blockchain) Cold (isolated) bitcoin-schweiz.ch
19 Cold Storage Devices
20 Which Wallet Mobile or static (Desktop, Hardware, Paper) Multicurrency or single use (Bitcoin) Private key under local control (Desktop, Hardware, Paper, Mobile) or external (Online) bitcoin-schweiz.ch
21 Seed Creation / Recovery with Seed During the installation of each HD or Hardware Wallet a 12 or 24 word Seed gets created. (words from a 2048 dictionary) Seed also used for recovery bitcoin-schweiz.ch
22 Master Private Key derived from Seed bitcoin-schweiz.ch
23 Public key cryptography, or asymmetrical cryptography bitcoin-schweiz.ch
24 Private / Public Key, Hash(SHA-256) and Bitcoin Address
25 Probability of Duplicated Bitcoin Address Example of 1 billion (Deutsch=Milliarde) users have 10 addresses each: 1FJe4vovr5p53nutPL4YLo4FZfzFpojtaY There are 2^160 or about 1,460,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 possible addresses In your scenario, 1,000,000,000 people are using 10 addresses each for a total of 10,000,000,000 possible addresses 10,000,000,000 / 2^160 should yield the probability of a collision occurring 10,000,000,000 / 2^160 = So the chances of a collision occurring in our scenario are approximately % bitcoin-schweiz.ch
26 Bitcoin Transactions bitcoin-schweiz.ch
27 Real Time View of Transactions
28
29 Blockchain Network *) = Peer to Peer *) Mastering Bitcoin: Unlocking Digital Cryptocurrencies Andreas M. Antonopoulos
30 Bitcoin Advanced Network maintained by "Miners" who are rewarded to verifying transactions with newly released coins (Role of central bank, replaces central bank) Miner gets block fee and transaction fees (for transactions in a block) Regulated by mathematics (PoW=proof of work)
31 Mining Target Value: A normal CPU can mine SHA256 at around 5 10 MH/s. An ASIC can mine SHA256 at around 5 10 TH/s, or About 1 million times more work per second than a CPU can.
32 Bitcoin Advanced (cont) Bitcoin Blocktime : 1 Block / 10 minutes or 144 blocks / day Coins released predictably (max. 21 million BTC, deflationary) Today 16 million BTC in circulation Block fee: Released every 10 minutes BTC, BTC, since BTC 2140: all available 21 million blocks are in circulation Secured cryptographically (Digital signature, Public/Private keys, 256 Bit Hash) Easy to divide and recombine (smallest unit = 1 Satoshi = BTC, or 1 BTC = Satoshi) It cannot be counterfeited (double spend protection; Immutability=transactions are irreversible) Bitcoin is not anonymous, but, rather, pseudo-anonymous. It can be sent anywhere in the world (primarily over internet), instantly, at near zero cost
33 Blockchain (simplified view)
34
35
36 One Block Forks, happens daily!
37 Chain Reconvergence!
38 Hard Fork (eg. Bitcoin -> Bcash or Bitcoin -> Bgold)
39 New Applications using Blockchain Notarization Land Registration Asset Management Proof of existence Digital identity Securities Loyalty Points Energy credits Votes...
40 Gartner Hype Cycle bitcoin-schweiz.ch
41 Gartner Hype Cycle 2017 (cont) Digital Platforms With bitcoin and Ethereum constantly in the news, blockchain might seem like it s just around the corner. However, most initiatives are still in alpha or beta stage. Enterprises are still deciding how to navigate this technology, but the lack of proven use cases and the volatility of bitcoin have created concerns about the viability of the technology. Long-term, Gartner believes this technology will lead to a reformation of whole industries. Of the two types of blockchain permissionless-public ledgers and permissioned-public ledgers enterprises should look toward the latter option. Permissioned-public ledgers have access controls owned/managed by rules, but still allow for a community. For commercial transactions, companies might look to permissionless-public ledgers such as bitcoin, which allows unknown or untrusted users to access the ledger. bitcoin-schweiz.ch
42 Blockchain and Bitcoin are disruptive
43 Blockchain and Bitcoin are disruptive
44 Live Demonstration (BTC Transfer km) bitcoin-schweiz.ch
45 Conclusion Bitcoin: Store of value -> Buy and Hold -> it s not too late Bitcoin: Money Transfer Bitcoin: Buying goods and services Cryptocurrency in general: Huge job opportunities! bitcoin-schweiz.ch
46 . bitcoin-schweiz.ch. Nehmen Sie vor dem nach Hause gehen ihr Starterkit mit! bitcoin-schweiz.ch
47 . bitcoin-schweiz.ch.. Blog und an Walter Dey und Jürg Kradolfer
48 Addendum bitcoin-schweiz.ch
49 Useful URL s
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