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!

Will implementing a CAPTCHA-like system require modifying multichaind source?

Thu, 01 Dec 2016 22:32:35 +0000

Hello,

Firstly, thank you for developing this amazing software. I'm going to be releasing an early alpha build of an application I'm working in a few weeks, and multichain is the biggest engine humming away inside it.

I need to implement a CAPTCHA-like system to prevent users from spamming the blockchain with garbage. I've been thinking about this problem a lot, and I suspect I will need to modify multichaind to accomplish this. I'll explain why my thinking has led to this conclusion, please let me know if there is another way I could tackle this problem.

Essentially, by main concern is that a user could receive asset issuing permissions on a blockchain (through my application), and then take their private key, connect to the blockchain with multichaind directly, and proceed to flood the blockchain with bad/useless data.

So far, the one solution I've come up with is integrating a CAPTCHA-like system directly into multichaind, perhaps requiring CAPTCHA entry only to users of a certain permissions group (e.g. an admin could continue to publish to the blockchain without entering CAPTCHA responses).

Does this seem like a reasonable solution, and can you think of any ways to incorporate this without modifying multichaind? Open to any solution that could help me prevent spamming/abuse of publishing rights to a blockchain.

Thank you!

MultiChain Developer Q&A - Recent questions tagged spam

Permissions Management against Block Congesiton

Will implementing a CAPTCHA-like system require modifying multichaind source?