Homework on Security & Immutability - Questions

  1. In decentralized network trust achieved by consensus and in centralized one - it is like checking database in bereaving that one source. It is much safer regarding hacks and other vulnerability just because it is decentralized and every node has its own copy of whole blockchain.
    2.Central authority has full authority over the information in the database that you are trusting. Also that database is centralized - so much easier to attack.
  1. How does a decentralized network increase security?

A decentralized network increases security by offering a network of nodes where no central point of failure can be found.

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

It is dangerous because, they are the only one in control of the information and are a central point of failure. Meaning they can easily be hacked.

  1. How does a decentralized network increase security?
    Because you do not need to put your trust in any organisation. Rather you put your trust in the network.

  2. Why is it dangerous to trust a central authority for security?
    Because you have to put all your trust in that authority and have no control over what happens.

  1. A decentralized network system runs on blockchain, making security of the network far stronger than what the current centralized infrastructure offers, because it provides security via nodes verification of transactions and trustlesness.
  2. A central authority can be hacked, or the admin manipulate the data history at his own will.

1. How does a decentralized network increase security?

A decentralized network running on a blockchain makes security of the network far stronger than a centralized server network because it provides security via compartmentalization. Even if attackers are able to access a block of data, they cannot infiltrate it as it is only a partial file. The architecture also splits files into small portions and replicates data across distributed file systems providing redundancy via multiple nodes. If a node is hacked or brought down, other nodes continue to function, presenting a failsafe that increases network stability.

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

With computing services that are internet based, service outages can happen anytime and can occur for any reason and you have very little control over the whole situation. If a central controller is compromised, your data could be compromised as well.

  1. Nodes verify transactions, validation. 2. Suspendable and shareable data by central org.
  1. How does a decentralized network increase security? Security is increased by having a trustless system that cannot be bribed or hacked. The network is global and transaction information is available for verification and use by everyone. Immutability of the network upholds the authenticity of the transaction history.
  2. Why is it dangerous to trust a central authority for security? Trusting a central authority for security is dangerous because there is a single vector of attack. Without regular auditing there is no way to verify the transaction history authenticity.

The only fact that the word decentralise apply mean that security is made by multiple node validators who don’t know eachother.
Central authority for security is like being the slave of the mood of that authority.

1- Trust and confidence is built on consensus and a mathematical protocol. Every transaction it’s verified by itself according to clear and objective rules.

2- A central authority is vulnerable and can be dishonest.

  1. Security is increased due to multiple proofs.
  2. A central authority can/will rob, cheat, steal because they are the only authority on a transaction.
  1. You trust the math and protocols that everyone uses. More importantly if a DL is tampered with on one or some machines then if most of the other nodes disagree, the real DL is still maintained. In a centralized network, if central database is hacked then everyone is affected.
  2. Hacking/tampering of central DB affects everyone. It is a single point of failure.

1-Many nodes checking validity of transaction vs. central authority where transaction can be breached or changed.
2-Centran authority can be hacked,breached, or altered. There is no golobal concensus.

  1. A decentralized network increase security because the exact copy of events is copied on all users and therefore it cannot be altered. It is opened for everyone to check and everyone to build on.

  2. Security from a central authority banks on the security of this entity only. This is a fragile system. On blockchain the security is dependant on sound math protocols and not just a central figure.

  1. How does a decentralized network increase security?
    Multiple nodes on a network are verifying the transactions through a consensus meaning there is no central point of failure. The data of these transactions cannot be removed or changed meaning it is immutable. The trust is simply in the networks math and protocol that it was created on.

  2. Why is it dangerous to trust a central authority for security?
    By having a single point of failure, that may or may not even be based on a protocol the network users can verify, the central authority could be a bad actor and data breaches or modifications may not be noticed until it is too late.

  1. It removes the possibility of one individual altering the blockchain without verification.
  2. A central authority can make decisions by fiat, with no one to dispute the decisions.
  1. How does a decentralized network increase security?
    Decentralized network increase security because there is no central entity to to attack and you need a lot more resource to attack the network.
  2. Why is it dangerous to trust a central authority for security?
    When you give information to a central authority then this data is not yours to operate any more. Then is up to them to make sure to secure your data.

1: You trust the network, not the organization.
2: When there is only one central copy of a database, it is easy to edit the database and commit fraud.

Homework on Security & Immutability - Questions

  1. How does a decentralized network increase security? We trust the Blockchain. Previous two pieces, Provenance and Consensus. Multiple computers, decentralized.
  2. Why is it dangerous to trust a central authority for security? Controlled by a single entity. They control your data it’s not yours. Systems can go down easily where blockchain is not centralized so if one computer goes down there are all the other computers on the chain operating.
  1. decentralized networks cannot take sides, have no emotion attached, cannot be paid off. Cannot be broken into.

  2. because you have to trust that they take security seriously and won’t be hacked. Someone on the inside can steal your information or they can be misleading and in the end you find out that they have been selling your information to a third party. User agreements are 100 pages long and written in lawyer terms no one reads and or understands.

1, Multiple nodes must validate information submitted so no single point of failure. multiple copies of the verified data make it virtually impossible to corrupt the data.

2, Weaker, single point of failure. Trust is required. You do not control your data so access to it can be denied.