# TEA ID Every TPM ships with a unique asymmetric key, called the *Endorsement Key* (EK), burned by the manufacturer. We refer to the public portion of this key as *EKPub* and the associated private key as *EKPriv*. Some TPM chips also have an EK certificate that is issued by the manufacturer for the EKPub. We refer to this cert as *EKCert*. The **TEA ID** is the EKPub of TPM chip inside every TEA mining machine. This ID cannot be modified or updated once the chip is built. The TEA machine manufacturor can register this TPM ID to our layer-1 blockchain. The registration process requires the TPM manufacturor's EKCert. Anyone can verify any TPM EKPub using such an EKCert. For more detail please see [Microsoft's explanation of TPM key attestation](https://docs.microsoft.com/en-us/windows-server/identity/ad-ds/manage/component-updates/tpm-key-attestation). --- # 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://dev.teaproject.org/z_glossary/tea_id.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.