Dit bestand bevat een sv van alle technologieën (Blockchain, IoT, AI,
VR&AR, 4D printing, biochip) van zowel de papers als yt video’s.
Blockchain
Youtube video’s:
Def: Peer-to-peer software technology that protects the integrity of a digital piece of information.
Blockchain uses thousands of personal computors on the Internet, all transactions are copied and
cross-checked between every computer in a system-wide accounting book called ‘the ledger’, which
becomes very safe at scale. (no central authority)
Solves the double spending problem: how can bob and alice ensure that one virtual banana is
not send twice?
How it works:
Each transaction is put into a block, each block is connected to the one before and after. A fingerprint
of each block is added to the next, that creates an irreversible chain.
*Blockchain is
-distributed (it works as a shared form of record-keeping, no one has the ownership of the system)
-permissioned (everyone is permissioned to have a copy of every record and no transaction can be
added to the chain without the consensus across participants) (when they are built for business)
-secure (the previous words makes it secure).
Wordt gebruikt voor:
-Geld
-digitale identiteiskaarten
-contracten
-….
Bitcoin
Kan meer zijn dan alleen geld, een bitcoin bestaan uit 100.000.000 units, elke unit is identificeerbaar
en programmeerbaar. Je kan om het even wat toewijzen aan die unit (een eurocent, een aandeel,…).
The programmable character of bitcoin to completely rebuild and innovate our financial sector and
our administrative processes (will leads to decrease of bureaucracy). Zo kan je bijvoorbeeld een
maximum bedrag opleggen dat je wilt uitgeven aan een bepaald iets in een bedrijf.
,Paper
1. Chapter 1: Grasping blockchain fundamentals
Def: Blockchain is a shared, immutable ledger that facilitates the process of recording transactions
and tracking assets in a business network.
1.1. Tracing Blockchain’s Origin
1.1.1. The shortcomings of current transaction systems.
Paper money, banking systems, have emerged to facilitate the exchange of value and protect
buyers and sellers. Innovations (the internet, credit card systems) have improved the speed
and efficiency of transactions.
MAAR many business transactions remain inefficient, expensive, …
The volume of transactions are growing worldwide, what will increase these disadvantages.
To address these challenges, the world needs faster payment networks that provide
mechanisms to establish trust, require no specialized equipment, have no chargebacks or
monthly fees, and offer a collective bookkeeping solution for ensuring transparency and
thrust.
Solution: Bitcoin (will resolve the inefficiencies, complexities,… of current transaction
systems)
Enkele termen:
No central monetary authority: no one controls it
They’re mined: they aren’t printed
1.1.2. The birth of blockchain
Bitcoin’s shared ledger: blockchain
Can be used to record any transaction and track the movement of any asset whether
tangible, intangible, or digital
The takeaway lesson: Bitcoin and blockchain are not the same. Blockchain provides the
means to record and store Bitcoin transactions, but blockchain has many uses beyond
Bitcoin. Bitcoin is only the first use case for blockchain.
1.1. Revolutionizing the traditional business network
traditional methods: participants on a network keep their own ledgers and other records. (its
very expensive, inefficient)
, The blockchain architecture: gives participants the ability to share a ledger that’s updated
through peer-to-peer replication (each participant acts as both a publisher and a subscriber) each
time a transaction occurs. Each node can receive or send transactions to other nodes, and the
data is synchronized across the network as it’s transferred.
Eliminates duplication of effort and reduce the need for intermidiaries.
1.1. Benefits of blockchain for a business
Benefits of blockchain in general:
Time savings: Transaction times are slashed from days to minutes, it doesn’t require
verification by a central authority
Cost savings: reduce expenses due to
1/ less oversight is needed because the network is self-policed by network
participants
2/ intermediaries are reduced
3/duplication of effort is eliminated because all participants have access to the
shared ledger
Tighter security: If a network is permissioned, it enables the creation of a members-
only network with proof that members are who they say they are and that goods or
assets traded are exactly as represented.
Some blockchains are permissioned (when they are built for business) and some are not. Benefits of
a permissioned blockchain:
Enhanced privacy: Through the use of IDs and permissions, users can specify which
transaction details they want other participants to be permitted to view
Improved auditability: : Having a shared ledger that serves as a single source of truth
improves the ability to monitor and audit transactions.
Increased operational efficiency: Transactions can be conducted at a speed more in
line with the pace of doing business.
, 1.1. Building trust with blockchain
Blockchain builds trust through the following five attributes:
1. Distributed and sustainable: The ledger is shared, updated with every transaction, and
selectively replicated among participants in near real time (distributed). Because it’s not
owned or controlled by any single organization, the blockchain platform’s continued
existence isn’t dependent on any individual entity (sustainable).
2. Secure, private, and indelible : Permissions and cryptography prevent unauthorized
access to the network and ensure that participants are who they claim to be (secure).
both transactions and the identity of transacting parties can be masked (private). After
conditions are agreed to, participants can’t tamper with a record of the transaction;
errors can be reversed only with new transactions (indelible=onuitwisbaar).
3. Transparent and auditable: Because participants in a transaction have access to the same
records, they can validate transactions without the need for a third party (transparent
and auditable)
4. Consensus-based and transactional: : All relevant network participants must agree that a
transaction is valid.
5. Orchestrated and flexible: Business rules and smart contracts can be built into the
platform (orchestrated), blockchain can evolve to support a wide range of activities
(flexible).
1. Chapter 2: Taking a look at how blockchain works
1.1. Why its called ‘blockchain’
