Buslink CipherShield USB Powered USB 3. 0/eSATA 256-bit Encrypted HDD Series prevents unauthorized access to your digital data with the support of the most common interfaces for PC and Mac. CipherShield design features a chip embedded in the access key which matches the AES encryption module on the controller board. The drive will automatically lock down its content once the key is unplugged, or power is shut off. And without the access key, data will not be seen or accessed in the event of theft or loss of the external drive. Data stored on the hard drive are safeguarded by hardware-based National Institute of Standards and Technology (NIST) certified industrial strength AES (Advanced Encryption standard) cryptographic engine. The advantage of hardware encryption over software encryption is that you need not be concerned about Trojans/viruses or software upgrades, which results in a decrease of total cost of ownership. Since CipherShield encrypts data independent of the operating system; removing the drive and connecting it directly to the SATA BUS will not defeat the encryption. Unit is bundled with two keys and registration is required for key duplication. Power adapter not required, draws power from USB cable when using either USB or eSATA connection. System Requirement: Microsoft Windows 10, 8, 7, Vista, Server 2012, 2008, 2003 (XP and 2000 Server not supported for larger than 2TB), Mac OS X 10. 4 or later with Intel Processor, Linux with GPT support. Package Content: CipherShield USB Powered 256-bit AES External HDD, 2 Cipherkeys, USB 3. 0 and eSATA cables, and User manual.