Abstract: Implementations provide a secure and flexible encoding technique that enables data set owners to share data without losing interoperability or breaking data constraints. A device may receive a request to encode an input that includes a plurality of data portions. A device may identify protected data types within the data portions, transform raw text corresponding to a protected data type based on a seed and a base set to encoded text, and include the encoded text in an output. The seed and/or base set can be selected by a requestor. The output configuration can be defined as different from the configuration of the input. The encoded text retains a format of the raw text so the encoded text does not violate existing data constraints. The device may also ensure a minimum level of fidelity in the encoded text.