BCASim

BLOCKCHAIN ATTACK SIMULATOR

Explore blockchain behavior.
One simulation at a time.

An open-source blockchain simulator for attack analysis. Customize node behavior and protocols, then observe how the network and blockchain evolve.

Explore the demo View source ↗
  • Double spending
  • Selfish mining
  • Sybil attacks
NETWORK VISUALIZATION
Network simulation showing nodes and their connections
A network simulation generated with BCASim — Watch animation

THE TOOLKIT

From scenario to insight

Build an experiment. Visualize the results. Understand the behavior.

01

Simulate

Configure node behavior and protocols to run blockchain attack scenarios.

Get the simulator 02

Visualize

Explore network connections and the structure of the blockchain.

Get the visualization tool 03

Customize

Learn how to configure simulation parameters and design attack scenarios.

Read the guide

GET STARTED

Run your first simulation

Requires Java 1.8+ and Apache Maven 3.6.3.

Explore the configuration guide → 
git clone https://github.com/bcasim/bcasim
cd bcasim
mvn clean package
java -cp target/bcasim-0.0.1-SNAPSHOT.jar jp.kota.bcasim.main.Main