MultiChain Developer Q&A - Recent questions tagged attack

Permissions Management against Block Congesiton

Thu, 21 Nov 2019 19:14:06 +0000

Let's say you created a relaxed permissioned network constituted of 10 nodes with mine permissions.

Assume Nodes A2..A6 (none admin) goes rogue and starts filling the network with empty blocks. They have enough to meet the mining-turnover parameter and are clogging the network.

You, Node A1, as admin, want to cut their mining permissions. However, as far as I understand, this permission is cut using a transaction that must be inserted on the blockchain, and the attacking group can withholding including this transaction in the block.

Is it possible to use a broadcast message instead of a block transaction? At least temporarily?

I'm eager to discuss this with you and see your thoughts!

About multichain administrator attack

Tue, 14 Nov 2017 13:29:08 +0000

hi,

If we use administrator to give permission to all other nodes in blockchain, then it would be a kind of centralized system. And if the administrator is attacked/ hacked or controlled by the attacker then there will be a single point of failure as in case of centralized system. How can we handle this problem in multichain? In "https://www.multichain.com/developers/permissions-management/" at section "Permissions consensus"; it states that "Depending on the blockchain parameters, a single administrator may not be able to grant or revoke admin, activate, mine, issue or create permissions on their own. Instead, a number of administrators are required to agree on the same change, and only then is it applied. This ensures that a single rogue administrator is not able to unilaterally decide who has the right to perform the blockchain’s most critical tasks....."

Does this mean we need to have multiple administrators in a single chain of multichain? or there will me multiple administrator in a single blockchain.

My goal is to have multiple parallel blockchain with each blockchain in each province of the country for example.

Can you please clarify on this issue? Than you.

Is there any tool which can simulate and artificial attack on my private multichain

Sun, 02 Apr 2017 06:22:04 +0000

Hi,

I am a student, playing around with multichain.

I wanted to demonstrate that multichain is secure and can not be tampered.

Is there any tool or can u guys suggest me, how can i launch a artificial attack on another node, (without any permissions).