Silent and economic cryptographic file server
Mainboard and CPU
I chose a VIA Epia MII 12000 as the base platform, because this was
the only board with PadLock ACE support which I could get in Germany at
this time (March 2005)
- VIA C3 Nehemiah with 1.2 GHz and PadLock ACE
- TDP of 17 Watts
- Backpanel-IO: cardbus, compact flash, 2x USB 2.0, 1x Firewire
For the operating system harddrive I bought a Hitachi Travelstar with 60GB. It's a 2.5 inch drive, but with 7200 rpm, so it is reasonable fast.
Furthermore this model is designed for 24/7 operation. The main reason I choosed a 2.5 inch drive was power consumption, as it only needs 2W to operate
(and therefore has less heat dissipation.)
|60 GB travelstar with 7200rpm.
Fortunately there was still enough place for two 3.5" harddrives.
|system, home, mail
|data, TV recordings, Linux ISOs etc.
Power supply, RAM etc.
I purchased an external fanless 12V power supply with 80 Watts and an internal DC-DC Converter.
With 80 Watts there is enough room for experiments and to ensure a stable boot process, when all hard drives spin up at once.
Furthermore, I got a 512 MB DDR Kingston DIMM. And an INTEL Pro1000MT gigabit ethernet controller.
Update:Now (2006) a 1024 MB DDR DIMM is used.
At the moment the system is running a customized Debian Etch with Linux kernel 126.96.36.199.
To make use of the integrated Padlock hardware accelerator a recompiled debian package is used.
AES performance with and without Padlock used:
(measured with "openssl speed -evp aes-256-ecb -engine padlock")
The 'numbers' are in 1000s of bytes per second processed.
type 16 bytes 64 bytes 256 bytes 1024 bytes 8192 bytes
aes-128-ecb 15669.02k 16916.54k 17280.51k 17429.85k 17479.00k (software)
aes-128-ecb 88912.67k 320026.56k 865422.51k 1462438.36k 1840122.54k (padlock)
aes-128-cbc 11833.27k 16052.56k 17805.99k 18316.63k 18392.54k (software)
aes-128-cbc 70580.31k 230124.42k 510011.90k 739012.27k 846489.43k (padlock)
aes-256-ecb 11817.72k 12487.81k 12663.92k 12767.57k 12776.79k (software)
aes-256-ecb 88587.47k 320000.32k 761852.67k 1139517.78k 1326309.29k (padlock)
aes-256-cbc 9558.71k 11995.58k 12968.62k 13221.89k 13265.05k (software)
aes-256-cbc 68891.22k 208040.11k 421406.38k 562406.66k 621147.62k (padlock)
I use a modified ssh version which makes use of the openssl padlock engine.
Packages for Debian etch can be found here.
|Nearly finished case.
|Those CD drives are pretty big!
|Somewhat ugly, but hey...