The Office of Innovation has held internal sessions to outline and demonstrate how blockchain networks work, using the Bitcoin network.

   How blockchain networks work from Qusai Jouda

Subjects covered include (but are not limited to):

Session 1:
Introduction: Money, digital cash, self-sovereign money systems.
Centralized and decentralized networks.
Bitcoin network architecture.
Full-nodes, miner nodes, light-nodes, wallet applications, blockchain explorers.

Session 2:
Digital signing: public/private key cryptography. Ownership based on that instead of trust.
Live transaction: explaining how a transaction goes through, using bitcoin network illustrations.
Hashing, blocks, blockchain, proof-of-work (mining), coinbase transactions (incentive model).

Session 3:
Consensus Mechanisms: proof-of-work.
Transactions: inputs, outputs, unspent transaction outputs, bitcoin script (i.e smart contracts).

Session 4:
Ethereum network.
ERC20 tokens.
Live demo using truffle.js and Geth – deploying ERC20 token.

Further Reading:

Technical Resources


UNICEF’s work with Blockchain
Learn more about it here.
Let’s collaborate. Join our growing community.
Sign up here to get updates on our work, coming events, training classes, and developments.
Need seed capital for your open blockchains software solutions? $50-90K equity-free investments to provide early stage (seed) finance are available to for-profit technology start-ups that have the potential to benefit humanity. Apply here.
Technical Contact: @qusaijouda
Communications Contact: acollins [at] unicef [dot] org