# Authentication ## NFC Authentication MIDNIGHT utilises encrypted NFC technology for authentication. Though an encrypted key-value pair, any piece on MIDNIGHT can be classified as authentic. NFC chips are embedded in physical pieces sold on MIDNIGHT. The embedding is done in a manner to say that, if any attempt of tampering with the chip results in irreversible damage to the piece. All chips are read-only. Once the chips have been written by the project owner, they cannot be overwritten. At the current moment in time, the authentication is centralised. This means that only MIDNIGHT holds the decryption in order to verify authenticity. ## House Authentication This is a process by which a piece is sent back to MIDNIGHT, prior to resale. This ensures the most accurate classification of condition, but also gets an additional verification of authenticity. --- # 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://docs.midnight.art/authentication.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.