13
votes
What can blockchain do that normal databases systems won't?
Blockchains are data structures, whose only advantage is that storing data in that structure allows you to achieve decentralization under certain conditions.
So your question reduces to "how is ...
- 1,503
9
votes
What can blockchain do that normal databases systems won't?
This is hard to answer, as "blockchain" isn't a very well defined thing. Often the term refers to some use of cryptography in a distributed system, but what it means beyond that depends on who you ask....
- 110k
5
votes
Is a private blockchain better in any sense than a database?
Researcher Arvind Narayanan stated his opinion on this matter in his post “Private blockchain” is just a confusing name for a shared database:
It is true that adding signatures and hash pointers ...
- 151
4
votes
Accepted
What is the point of a permissioned blockchain?
If your nodes are trusted, though, a blockchain isn't necessary at all, you know the code isn't malicious. So what is the point of a permissioned blockchain?
Knowing someone's identity is not ...
- 29.5k
4
votes
How can I get a private key for this address
How can I get a private key for this address
There is essentially no way.
Is it possible for me to withdraw my bitcoin I invested here? I don't have the private key
No.
It looks like you fell ...
- 28.5k
3
votes
Perfect option scammed
They're an obvious scam. I mean, absurdly obvious.
I'm really baffled how anyone could fall for something like this. If someone had a way to reliably invest $10,000 and turn it into $120,000 in a ...
- 51.7k
3
votes
Is it logical to use “Proof-of-Authority” for a “public” blockchain?
What is the reason? And Is it logical to use "Proof-of-Authority" for a "public" blockchain, in sense of keeping decentralization?
Proof of Authority is, by definition, centralised. If the authority ...
- 17.3k
3
votes
Accepted
How to reset bitcoin testnet
The testnet data directory is not ~/.bitcoin but rather ~/.bitcoin/testnet3. ~/.bitcoin holds the data for the main Bitcoin blockchain.
- 72.1k
3
votes
Blockchain as a service - is this really just a replacement trusted third party?
First lets distinguish between a blockchain and Blockchain as a Service (BaaS), because they're two different things.
Bitcoin, and other crypto-currencies, use a distributed ledger in a peer-to-peer ...
- 133
2
votes
Accepted
What is the main difference between " enterprise" blockchain and regular blockchain?
The line between a blockchain and a distributed database (or ledger) is currently blurred (some would say deliberately so given the hype surrounding "blockchains" at the moment). R3 have recently ...
- 15.8k
2
votes
Why are blocks in a permissioned blockchain linked together?
I think you're mistaking PoW for a mechanism that guarantees the chain's correctness, rather than just a means for finding consensus.
A blockchain (without PoW) is just an ordered list of batched ...
- 110k
2
votes
How to set up a private chain/local testnet : reverse engineering the blockchain code
The question slightly exceeds capabilities of this q&a forum. Maybe better to search bitcointalk.org, there these type of requests get often discussed. Join one of the discussions there!
Anyhow, ...
- 5,116
2
votes
Permissioned or Permissionless blockchain? Which one is PoS more adapted for?
Frankly, I don't think your definitions are useful. But by your definitions, PoS makes a network permissioned by definition. In a proof-of-stake network, you can only participate in the validation of ...
- 51.7k
2
votes
Bitcoin private network on Amazon EC2
I want to be able to control how the different nodes are
interconnected to each other in this network. Is there a way to do
this on Bitcoind?
As per bitcoin.conf I suggest setting up the connect = X....
- 1,719
1
vote
Can you have a cryptocurrency with a single source of truth?
Is that even legal to do? Can someone create their own centralised cryptocurrency and let people buy/use it?
What is legal/not-legal can change drastically depending on what jurisdiction you live ...
- 18.4k
1
vote
What can blockchain do that normal databases systems won't?
Lack of trust
A major difference over a traditional database system is that blockchains enable a "shared database" without having to trust the holder of that database.
It doesn't necessarily have to ...
- 291
1
vote
Accepted
What is single member blockchain?
The term single member is not correct. Hyperledger blockchains, such as Hyperledger Sawtooth or Hyperledger Fabric, are private blockchains or permissioned blockchains. You need permission to join the ...
- 259
1
vote
Permissioned blockchains on EVM: are these private ledgers os it all on ETH main net?
They are completely separate networks, with a different genesis block.
Geth and parity support running your own private networks that can utilize the features of ethereum (and the ecosystem of tools ...
- 17.3k
1
vote
Do private blockchains need consensus protocols?
TL;DR Yes, consensus protocols are always needed in distributed systems where there could be multiple writers to the same data. When it is possible for multiple participants to simultaneously update ...
- 173
1
vote
How to hack a Password of Private Key
The private key you have is encrypted so to decrypt it you need to have a valid password that's why it is asking for the password. It can't be hacked, you need a correct password
- 161
1
vote
How can I get a private key for this address
Please note, you should never pay for a Blockchain Wallet private key. To receive a bitcoin, you only need to provide the sender with a bitcoin address from your wallet.
I'm sorry to hear about the ...
- 11
1
vote
Share private data and prevent data forwarding
Nothing can prevent B from exposing or forwarding the data once he has access to it.
- 3,309
1
vote
Blochchains that support data privacy and/or strengthen parties pseudonymity
For question 1 and 2, ZCash (not Zikas) provides some solutions.
It's based on Bitcoin's code and has 2 types of addresses:
non-shielded: they behave exactly like normal Bitcoin addresses
shielded: ...
- 1,274
1
vote
Blockchain implementation in banks
Think of a blockchain-based implementation of the financial backbone as the modern-day equivalent of Automated Clearing House (ACH), the national standard for processing checks.
Based on banking ...
- 56
1
vote
How would a centralized block chain work?
Sure. You just use a database that keeps track of who has how much money. You can do this any way you want. You don't need anything fancy like POW, POS, or even a blockchain. The only reason you would ...
- 51.7k
1
vote
In a private blockchain network, can we delete the first N blocks and reassign the N+1th block as the genesis block?
With blockchains, you can basically do anything with a hard fork. In the case of private blockchains, you will have a much easier time getting consensus for a hard fork, perhaps as easy as the ...
- 8,852
1
vote
Accepted
IBM Hyperledger Fabric Running Multiple Nodes on Multiple Datacenters & PCs
In the recent technical steering committee meeting of Hyperledger they discussed the planning for an initiative to connect across multiple cloud providers, to demonstrates that Fabric can be deployed ...
- 1,133
1
vote
Blockchain use in Record Management
I think there are few other advantages with using blockchain such as improved peer-to-peer sharing with audit trail and no single point for cyberattack.
In saying that Iron mountain would no longer ...
- 11
Only top scored, non community-wiki answers of a minimum length are eligible