uFile Encryption Toolkit by Cypherbridge Systems is a portable File Based Encryption SDK for embedded file systems and applications. It provides protection for data-at-rest on fixed and removable media, ensuring data privacy and blocking data exfiltration. The toolkit encrypts files to meet data privacy requirements and ensures file safety on lost or stolen devices. It offers APIs to open, close, read, write, and seek files with encrypted context extensions, supporting both stream-oriented sequential and random access. Encrypted files maintain a 1:1 size ratio with plain text files, with an optional metadata header. The system uses unique per-file keys and allows encrypted files to be mixed with unencrypted files on storage media. It is compatible with ANSI C stdio.h file systems and proprietary file system APIs on removable and fixed flash media, including SD and USB flash drives.
