GHOST, GHAST, Conflux
Goal of Conflux: Realize the hardware potential with a scalable consensus protocol.
GHOST
GHOST is Weak to liveness Attacks. When block generation rate is high, attacker can hypothetically stall blockchain consensus by balancing 2 branches (prevent consensus).
GHAST (Greedy Heaviest Adaptive SubTree)
Assign different weights to generated blocks to break the balance in order to make progress. In normal scenarios, assign equal weights to blocks.
- Operate like GHOST When attack happens, assign high weights to a small subset of blocks
- Operate like structured GHOST approaches
- Ensure consensus progress