evap - SSD Data Evaporation Tester

This tool runs on the MacBook Air, and makes it easy to test SSD evaporation.

For casual use, or classroom demos, I recommend using Disk Drill on a Mac, or HxD on a PC, as demonstrated in the LayerOne talk below.

Download evap.gz

Slides from LayerOne 2013 Explaining Evap (PPTX)

Videos and Research into SSD Data Evaporation


Preparing a SSD Test Partition

In Applications, open Utilities, and launch Disk Utility

Select "APPLE SSD ..." as shown below:

Click the Partition button near the top.

Click the + sign at the lower left to add a new partition. In the central portion of "Disk Utility", click the "Macintosh HD 2" box.

On the upper right, in the "Partition Information" section, enter a Name of ssd and a Size of 1.13, as shown below.

Click Apply. In the pop-up box, click Partition.

You should now have a partition with approximately 1 GB of available space, as show below:

Downloading and Installing evap

In a Terminal window, execute these commands:
cd /

sudo curl -o evap1.gz http://samsclass.info/seminars/evap/evap1.gz

md5 evap1.gz

You should see this value:

MD5 (evap1.gz) = 84559fd4ac67ec836ae217855eccb1d9

If you don't, something went wrong with your download.

In the Terminal window, execute these commands:

cd /

sudo tar xzf evap1.gz

sudo /e/evap1

Using evap

When you start evap, it warns you that you need to have the ssd partition and the e working directory ready first.

You already did that in the steps above.

Demonstrating Evaporation on JHFS+

Use these commmands:

Demonstrating Remanence on HFS+

Use these commmands:

Last modified 7 am 5-26-13 by Sam Bowne