> For the complete documentation index, see [llms.txt](https://documentation.depinsubnet.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://documentation.depinsubnet.com/subnet-node-type/verifier-node.md).

# 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.