# Verifier Node Verifier Nodes leverage the **TEE** (Trusted Execution Environment) and **FHE** (Fully Homomorphic Encryption) technologies, it plays a crucial role for checking quality of service foreach Subnet Protocol, validate data integrity and maintaining the privacy of user's data. * Data Versioning: Track changes in data and version control. * Cyclic Redundancy Check (CRC): Detect errors in data transmission. * Digital signatures: Use public key encryption to verify the origin and integrity of the data. * Hash functions: Use algorithms such as MD5, SHA-256 to create a unique fingerprint for the data. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://documentation.depinsubnet.com/subnet-node-type/verifier-node.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.