MIX Blockchain upgrade to mitigate risk of 51% attack

As outlined in the previous blog post, MIX Blockchain is implementing a 3 layer system to mitigate the risk of a 51% attack.

Layer 1 is now ready for deployment. This limits the maximum re-org depth to 64 blocks, making a successful double spend much harder and laying the foundation for layer 2. Every node on the network should update to the new system.

This is not a hard fork, so it is not necessary for nodes to update before a certain block.

Nodes that are running on Parity just need to adjust their configuration by adding the following parameters:

--pruning=fast --pruning-history=64 --pruning-memory=0

Geth nodes need to switch from MIX Multi-Geth to MIX Geth. This is a version of Geth specifically for MIX, so it doesn’t need the MIX parameter and has built in max re-org depth.

See configuration instructions for full details.

I will be reaching out personally to major node operators over the coming days to ensure that stage 1 is deployed.