Source:
DailyTech - Lenovo Security Feature Kills Notebooks via Text Message
also,
DailyTech - Lenovo Security Feature Kills Notebooks via Text Message
In the event that a notebook is lost or stolen owners send a text message with a command "lockdown PC now" or "PC shut off."
If the shut off command is sent, the machine will turn off and when the thief tries to turn the machine back on it will lockdown automatically. A text confirmation is sent back to the user when the shutdown or lock is executed.
If the notebook is recovered users can unlock it with a pre-set pass code entered when the notebook starts up.
Lenovo says that the Remote Disable service will be included in the price of notebooks at no additional charge and will be available on mobile broadband equipped ThinkPad notebooks. The system will operate in areas where cellular phone GSM signals are supported and SMS text messages can be sent.
also,
"To further enhance security, select ThinkPad® and ThinkCentre® systems also include an embedded chip called the Trusted Platform Module (TPM). ThinkVantage Client Security Solution works in conjunction with this chip to manage encryption keys and processes.
The TPM itself is isolated from the operating system using patented tamper-resistant technology. To initialize the TPM, users or administrators simply download the Client Security Solution and run a single setup wizard to install the software and create a set of master encryption keys.
The Client Security Solution and TPM store and enable user authentication through integrated hardware rather than in the software or memory, both of which are more vulnerable to unauthorized users."
This means that the information on the hard drive is encrypted with a hardware solution to protect it.