# Security Model

Security in ABC Stack is based on two primary mechanisms:

1. **Data Availability**: Celestia's data availability sampling ensures that all transaction data is provably available to the network.
2. **State Validation**: Full nodes independently validate all state transitions according to the chain's rules.

This model provides strong security guarantees while enabling high performance and sovereignty. Unlike traditional L2s that rely on fraud proofs and challenge periods, ABC Stack's security is immediate and doesn't require trust in external validators or settlement layers.


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