> For the complete documentation index, see [llms.txt](https://cruxdecussata.gitbook.io/xchain-introduction/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cruxdecussata.gitbook.io/xchain-introduction/overview/how-does-xchain-work/execution-model.md).
# Execution Model
XChain works by opening secure, direct communication channels between participating nodes. Through these encrypted channels, nodes form dynamic and unpredictable chains that execute workflows in parallel, reducing network load and avoiding global congestion.
Each node in the chain authenticates its peers using cryptographic identities, ensuring that only valid participants contribute to execution. This structure allows XChain to quickly and safely certify data and operations that do not require immediate or preemptive finality.
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