Bitcoin 技術介紹

1. 比特幣技術介紹
http://media.coindesk.com/2013/08/how-can-i-buy-bitcoins-630x382.jpg

2. www.maicoin.com

3. –An anonymous cryptographer

6. Bitcoin( )
Bitcoin Doesn’t Scale ( )

7. (Address)
: 1ineSXXPBjDLr7SeERmnS3TH3m9su2kRY

8. (Transaction) - (1)
network

9. (Transaction) - (2)
transaction

10. (Blockchain) - (1)
bitcoin network

11. (Blockchain) - (2)
SHA-256(prev_hash +
Tx_hash + nonce)
n bit 0
Proof-of-work

12. (Blockchain) - (3)
(Consensus)
local chain
(51% attack)
trust

13. (Blockchain) - (4)
Double-spending
problem
http://4.bp.blogspot.com/-5gM2hXGRlmU/VAt4Tfdu4II/AAAAAAAAFx8/JMlrGKFe0Pg/s1600/
bitcoin_blockchain_double_spend.png

14. (Blockchain) - (5)
Bonus
50 bitcoin, 210000 block

15. (Blockchain) - (6)
1 block 10
2016 block ( ),
, proof-of-work
6 block ( 1 ),

16. (1)

17. (2)
bitcoin : bitcoin script
stack-based, no loops

18. Bitcoin Doesn’t Scale
1 MB block 1 block 2000 transaction
1 7
1 ?

19. http://anonymity-in-bitcoin.blogspot.tw/2011/07/bitcoin-is-not-anonymous.html

20. blockchain
Namecoin
blockchain as key-value database
DNS, Certificate Authority

21. blockchain
zCash

22. blockchain
Ethereum
$18,439,086 (on Kickstarter, 2014)
blockchain = storage
transaction = any turing complete program
anonymous, speed, …
in development…

23. Thank you!