External Data Validation

Definition ∞ External data validation refers to the process of verifying the accuracy and integrity of information sourced from outside a blockchain network before its use by smart contracts. This typically involves decentralized oracle networks or multiple independent data providers comparing and attesting to data points. Robust validation mechanisms are crucial to prevent manipulation and ensure that smart contracts operate on reliable real-world information. It safeguards against erroneous or malicious data inputs.
Context ∞ External data validation is a paramount concern in decentralized finance (DeFi) and other blockchain applications relying on off-chain information, such as price feeds or event outcomes. News frequently covers advancements in oracle technology and decentralized data verification methods designed to enhance the security and trustworthiness of these external inputs. Failures in external data validation can lead to significant vulnerabilities and financial losses, making it a critical area of development.