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Hardware SATA Hard Drive Encryption

Enova® SecureSATA RAID is a Parallel ATA to Serial ATA cryptographic bridge circuit board capable of encrypting all connected SATA hard drives at 133MB/sec real-time performance. The SATA hard drives connected after the Enova® SecureSATA RAID are secured by Enova®'s X-Wall® XO-128 and/or X-Wall XO-192 single chip cryptographic gateway to ensure the privacy and confidentiality of the data.

How does it work?

The configurations of the Enova® SecureSATA RAID can be versatile. You may choose to connect the Enova® SecureSATA RAID right after the Host IDE of the motherboard (yes, the Parallel ATA Host) to control up to four (4) SATA hard drives without limitation on per drive volume. All connected SATA hard drives are strongly encrypted with the X-Wall XO-128 and/or XO-192. There is absolutely no performance degradation. Please note, however, the Enova® SecureSATA RAID does not offer any actual RAID functionalities. It simply bridges through all RAID functionalities from the Host to the Device, thereby achieving the RAID functionalities with strong security. See below Figure 1, The Motherboard Host IDE Configuration, for standard configuration without encryption. Figure 2, The Motherboard Host IDE to Enova® SecureSATA RAID configuration, illustrates how the Enova® SecureSATA RAID is connected.


Or, you may select to connect the Enova® SecureSATA RAID right after a physical IDE RAID controller (such as Promise SX4000, SX6000 and/or 3-Ware 7506-4LP) through simple cable connection. Then you may connect up to four (4) SATA hard drives on the Enova® SecureSATA RAID to enjoy the performance and security it brings to you. Again, the Enova® SecureSATA RAID simply bridges through all RAID functionalities from the physical IDE RAID controller to the SATA hard drives, thereby achieving RAID functionalities with strong security. See below Figure 3, The Generic IDE RAID Configuration, for standard configuration without encryption. Figure 4, The Generic IDE RAID with Enova® SecureSATA RAID configuration, illustrates how the Enova® SecureSATA RAID is connected to encrypt SATA hard drives.


Hardware Security

The Enova® SecureSATA RAID contains four (4) Enova® Technology X-Wall XO-128 and or X-Wall XO-192 cryptographic bridge chips that are capable of delivering 133MB/sec bursting to all connected SATA hard drives. Operation of encryption and decryption is totally transparent to users. Look below Gartner's note on hardware security:

“Hardware is also not invulnerable to attack, but it generally requires much more sophisticated attackers with larger budgets than those that typically succeed against software-only security options. When information is sensitive, valuable or ‘must be trusted not to change’, hardware has to be part of the solution.” * Gartner Research Note COM-16-5309, 10 June 2002: “Software Security is Soft Security: Hardware is required”

No performance degradation

There isn't any performance degradation because of operations of encryption and decryption. All contents including Operating System, boot sector, and temp./swap files are strongly encrypted using NIST & CSE certified TDES 128-bit or 192-bit hardware algorithms.

The Enova® SecureSATA RAID does not require any special device drivers nor does it depend on Operating System. The PCI bus only offers the required connections for power, ground and support.

Key management

All SATA disk drives share the same Secret_Key which is provided via an external key token connected through an extension cord to the Enova® SecureSATA RAID for key insert. The key token serves as user authentication for access control while the X-Wall XO-128 and/or X-Wall XO-192 ASIC encrypts and decrypts. The X-Wall design allows users to remove the key token after the connected SATA hard drives have been properly recognized by the OS. The "Secret_Key" is transmitted into the X-Wall microchip at boot up via a hardwired protocol and is retained in protected volatile memory inside the chip until the power is turned off. The same key token has to present again during next power on or resume from hibernation state. The security is greatly enhanced because 1) the Secret_Key disappears when the power is down and 2) the data can not be read, because no one can find the Secret_Key by electronic means.

Key management

X-Wall XO-64 or XO-128 or XO-192
Host IDE Interface ATA-6 Compliant
Support 48-bits LBA Addressing (For Hard Disk >137GB)
Support PIO modes 0 to 4
Support Ultra DMA modes 0 to 6
Device SATA Interface SATA-I Interface of 1.5Gbps
Support Hard Drives Up to 4 SATA Drives
Support RAID Modes RAID 0, 1, 0+1, 5
PCI Interface PCI 2.2 Compliant (Power Only - 5V and 3.3V)
LED Indicators 1 - Power LED
1 - Key Error LED
Secure Key Interface Single Secure Key Operation
Enova® Standard 1394A Form Factor
Power Consumption For DES < 1.14A
For TDES < 1.30A
Dimensions 18 cm (L) x 9.5cm (W)


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