UTXO
https://steemit.com/coinkorea/@goldenman/utxo
Tx Verify
https://steemkr.com/kr/@yahweh87/15-3-n
Blockchain Overview
Block difficulty
https://steemit.com/kr/@yahweh87/10-difficulty-51
Reward
https://steemit.com/kr/@yahweh87/8-3-n
Blockchain in Finance