Homework on Security & Immutability - Questions

Blockchain and Bitcoin 101
#101
  1. How does a decentralized network increase security?
    Decentralized network does not depend on a single authority figure. Rather an interconnected network where every single transaction is verified not by one, but by many parts of the network. This function may seem redundant but it is a guarantee for enhanced security.
  2. Why is it dangerous to trust a central authority for security?
    Just as a network is far superior and secure to a single central authority. A single authority is vulnerable to errors and external corruption. It lacks backup systems for protection. It lacks the checks and balances that make a decentralized network more secure and inmutable.
#102
  1. How does a decentralized network increase security?
  2. Why is it dangerous to trust a central authority for security?

A decentralized network increases security because if a hacker changes data in one node, the other nodes will not agree with the change and it will be rejected.

It is dangerous to trust a central authority for security because there is no other party to oversee and verify what they do.

#103
  1. How does a decentralized network increase security?

It does so by trusting in maths and protocols, by having trustlessness with security on a global level and by building on a unified infrastructure without informational silos.

  1. Why is it dangerous to trust a central authority for security?

Because a central authority can be bribed, broken and hacked.

#104

  1. How does a decentralized network increase security?
    There is no single point of failure allowing corruption and fraud due to one person or group that controls the data.

  2. Why is it dangerous to trust a central authority for security?
    It is dangerous as there is ā€˜trustā€™ that the central authority will have your best interests in mind when conflicts arise and decisions made.

#105

  1. Decentralized networks increasing security by being trustless and eliminating a single point of failure by decentralization.

  2. Central authorities can be corrupted and lack accountability by having data on central servers.

#106
  1. They all use the same standard rules/protocol. Everone plays by the same rules.
  2. With one central authority I put my trust into a third part. There can be no concensus nor trustlessness.
#107
  1. Decentralized network verifies the transactions and agrees if it is legit. 2.Because just like the banks in many countries like india ,they can freeze your assets.
#108

  1. Data must be consistent throughout the decentralized network in order to maintain consensus between all the participating nodes. Data cannot be manipulated or copied and still be valid if its done through only one node in the network.

  2. When data is centralized in one database, the validity of data depends on the central authoritiesā€™ level of security and integrity to prevent any users from corrupting/manipulating data. The danger is the employment of trust in the central authority to value these two components.

#109

1.How does a decentralized network increase security?
Contrary to centralized systems, there is no single point of failure.

2.Why is it dangerous to trust a central authority for security?
It can be hacked or corrupted.

#110

  1. The trust is in the maths and the protocol. The network is guarding it self.

  2. A central authority will always put its own interest and security first.
    Companies having their own IT infra structures making transactions weak, complicated or even
    impossible.

#111

1- by making it public for every one to see and participate, and making no center for it in which every node have the same database or blockchain and not only stored in one or two severs like the central databases. which makes it extremely hard for hackers to hack because thereā€™s no starting point. and by not having to trust anyone but math.

2- because a central authority can be easily hacked or manipulated. or for an example if a fire starts in their company and the servers get burned the data that was stored in the servers would be lost forever.

#112
  1. By the use of math and protocols to build a trustless global infrastructure. It uses trustlessness to increase security.
  2. They can tamper with material information you leave with them or altogether destroy it without a trace.
#113

  1. How does a decentralised network increase security?
    No central authority controlling the data. Data is more resistant to hacking and loss as it is secured on multiple nodes spread across a global network.

  2. Why is it dangerous to trust a central authority for security?
    You are reliant on the integrity of that authority and centralisation makes the data more vulnerable to attack or loss.

#114

  1. Multiple Nodes are used to confirm a transaction.

  2. Because they can alter or give access to someone.

#115

1 No single point of attack and data cannot be changed by 3rd party
2 Down to Trust, use math protocol no trust required

#116

  1. Like the internet, the blockchain is a standard that is not controlled by one single entity. Thus, there can be no information or value silos, which are unable to efficiently communicate with each other, but still are competing with each other. One single authority can be hacked, or decide to be fraudulent, or simply discontinue the service, whereas a blockchain, once established, is incentivized to stay online and no one single node can make any alterations. Everything is set in stone.

  2. For the same reasons a decentralized network increases security, a central authority lacks it. The database it not 100% secure against hacks, the code and encryption is often closed source and canā€™t be audited by the public. A central authority can go bankrupt, discontinue its service, fall under strict regulations, act fraudulently. To put it simple, the central authority can make alterations to the data it is trusted with.

#117
  1. If one node is compromised, the rest of the network carries on.
  2. Thereā€™s no way to know for sure that the data is truly accurate.
#118

  1. by verification of each and every transactions by consensus nodes.

  2. because there are no security and immutability. might be mistake or bad behavior !

#119

a decentralized network removes the ability of a single interested party to alter or control the information recorded on the ledger.

its dangerous because power corrupts and absolute powerā€¦

#120

Homework on Security & Immutability - Answers

  1. How does a decentralized network increase security?

The decentralized network relies on consensus to provide
the truth. It is secure because the nodes are tasked with
confirming transactions and updating the blockchain as well as
identifying and not processing those transactions that are invalid.
This provides the overall security of the global network.

  1. Why is it dangerous to trust a central authority for security?

The central authority can be corrupted by the ā€œwhatā€™s in it for meā€ philosophy.
The network can be hacked, information stolen allowing for the
perpetuation of fraudulent transactions.