A [fingerprint](https://en.wikipedia.org/wiki/Fingerprint_\(computing\)) is... #flashcard a mathematical calculation that generates a unique hash value based on the content of the file. This hash value, often created using cryptographic hash functions like SHA-256, serves as a robust and unique identifier for the file regardless of its name or the source of the upload. By computing this fingerprint, we can efficiently determine whether the file, or any portion of it, has been uploaded before. <!--ID: 1751507776410-->