Definition ∞ A blockchain attack is a malicious action targeting the integrity or availability of a distributed ledger system. Such attacks aim to compromise the security, immutability, or functionality of the blockchain network. Understanding these threats is vital for evaluating the robustness of blockchain protocols and the security of associated digital assets.
Context ∞ The landscape of blockchain security is continuously contested, with various attack vectors being theorized and, at times, realized. Common concerns include 51% attacks, smart contract exploits, and network-level disruptions. Security researchers and protocol developers are engaged in an ongoing effort to fortify networks against these adversarial actions, with news often highlighting successful breaches or mitigation strategies.
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