The fourth generation of Apricoorn's Secure Keys offers next-generation security features and up to 25% lower operating temperatures. It features software-free, 100% hardware-based 256-bit AES-XTS encryption, integrated PIN authentication via the keyboard, and ultra-fast USB 3.1 (3.0) data transfer speeds. All data is encrypted during operation, and the PINs as well as device data remain encrypted while the drive is at rest. Fully cross-platform and operating system independent; it works on Windows, Linux, Mac, Android, Chrome, embedded systems, and devices with an active USB port and a storage file system. All internal components are protected from physical tampering by a layer of hardened epoxy resin, and the locked firmware makes it immune to malware attacks such as BadUSB.