36. How many available addresses?
1.46 x 10^48 possible addresses
(7.5 x 10^18) x (7.5 x 10^18) = 56x10^36 <<< Bitcoin addresses
grains on Earth grains on Earth
45. Alice Qusai
Private
Public
Signed Tx
Signed Tx
Signed Tx
Signed Tx
Signed Tx
Signed Tx
Signed Tx
Signed Tx
Signed Tx
Signed Tx
Signed Tx
Signed Tx
Signed Tx
Signed Tx
Signed Tx
Signed Tx
Signed Tx
46. Alice Qusai
Private
Public
Signed Tx
Signed Tx
Signed Tx
Signed Tx
Signed Tx
Signed Tx
Signed Tx
Signed Tx
Signed Tx
Signed Tx
Signed Tx
Signed Tx
Signed Tx
Signed Tx
Signed Tx
Signed Tx
Signed Tx
Signed Tx
The transaction then needs to
be mined in the blockchain
51. @QusaiJouda
PoW
• Embeds economic incentives into the blockchain
network, miners need to invest CPU power in the
network in order to be rewarded.
• Secures the network. It costs money to participate
in the network. Thus, it’s better for someone to play
fairly by the consensus rules or, mostly, he/she will
be losing.