This deck was presented as part of a company initiative, #TechTalks, aimed to provide a space for the sharing and exploration of topics of interest in the industry. Presented by: Zayter Munive, QA Analyst

1. Blockchain

2. What is Blockchain?
Public Ledger between peers maintained
through a distributed computer network and
not requiring any central authority or third
parties acting as intermediaries.

3. Characteristics
1) It is open (Public Blockchain).
2) It offers a reward system for the work of
validating the transactions in a process that is
called "mining" (Public Blockchain-Bitcoin).
3) It is a decentralized process. It does not
depend on a single organism. Anyone can
participate (Public Blockchain).
4) Immutable.
5) Anonymity through addresses (configurable in
private).

4. Advantages
● Security through Cryptography.
● Verification and validity of the information.
● Reduction of infrastructure investment costs.
● More power for individuals.

6. Types of Blockchain
Public
- Bitcoin: Pioneer Case, Absolute Mother of
Blockhain.
- Ethereum: Blockchain Fork (Smart Contracts,
Handling Assets).
Private
- BlockChain for Bussiness.
- Openchain.
- HyperLedger.
- IBM Blockhain.
- Azure Blockchain.

7. Blockchain BC Public
● Who maintains this database? Everyone who
wants to.
● How do you encourage those who maintain this
database to do it correctly?
Economy-cryptographic (proof-of-work).
● Who can produce the information that is recorded
in the database, who can send transactions in this
database? Everyone who wants to.
● Where is this database stored? Massively
distributed.

8. Private Blockchain
● Who maintains this database? A pre-selected
entity or group of entities.
● How do you encourage those who maintain this
database to do it correctly? Self interest.
● Who can produce the information that is recorded
in the database? A pre-selected entity or group of
entities (customers of a bank, partners of a
company).
● Where is this database stored? Central servers or
distributed among the pre-selected entities.

11. When to use Blockchain?
● Multiple groups (Multiple writers).
● Lack of Confidence between groups (Absence of
trust).
● Disintermediation - Costs reduction.
● Transaction interaction.
● Set of rules.
● Assets Movement (Back your assets).

12. Use cases
● Cryptocurrency.
● Voting.
● Lotteries.
● Crowdfunding.
● Energy Trading.
● Patents.

13. Disadvantages of Blockchain
● Scalability.
● Performance capacity.
● Storage limits.
● Integration challenges with corporate legacy
systems.
● There is no Administrator or Support Team to help
you. (Logical Consequence.)
● Documentation convulsed (Blame the hype).

14. Questions?

15. Sources
● http://www.multichain.com/blog/2015/11/avoidin
g-pointless-blockchain-project/
● https://revistaitnow.com/blockchain-es-una-perc
epcion-o-realidad/
● http://www.christiandve.com/2017/03/que-es-bl
ockchain-sirve-usos-utilidad-revolucion/