Examples include:

• GSM mobile phones have an identifier for the phone (separate from the identifier for the user) that can be blacklisted when the phone is stolen.
• Some car radios will stop working when the battery is disconnected, and only start working again when a numeric code is entered. This is intended to deter theft of the radio.
• In Windows Vista, Bitlocker can be used to encrypt files. One of the intended applications for this is that if someone steals your laptop, it will be difficult for them to gain access to your encrypted files.

Ross told a story of what happened when he needed to disconnect the battery on his car: the radio stopped working, and the code he had been given to reactivate it didn’t work - it was the wrong code.
Ross argues that these reactivation codes are unecessary, because other measures taken by the car manufacturers - such as making radios non-standard sizes, and hence not refittable in other car models - have made them redundant.

I described how the motherboard on a laptop had needed to be replaced recently. The motherboard contains the TPM chip, which contains the encryption keys needed to decrypt files protected with Bitlocker. If you replace the motherboard, the files on your hard disk will become unreadable, even if the disk is physically OK. Domain-joined Vista machines can be configured so that a sysadmin somewhere within your organization is able to recover the keys when this happens.

Both of these situations suffer from classic usability problems: the recovery procedures are invoked rarely (so users may not know what they’re supposed to do), and, if your system is configured incorrectly, you only find out when it is too late: you key in the code to your radio and it remains a doorstop; the admin you hoped was escrowing your keys turns out not to have the private key corresponding to the public key you were encrypting under (or, more subtly: the person with the authority to ask for your laptop’s key to be recovered is not you, because the appropriate admin has the wrong name for the laptop’s owner in their database).

I also described what happens when an XBox 360 is stolen. When you buy XBox downloadable content, you buy two licenses: one that’s valid on any XBox, as long as you’re logged in to XBox live; and one that’s valid on just your XBox, regardless of who’s logged in. If a burglar steals your Xbox, and you buy a new one, you need to get another license of the second type (for all the other people in your household who make use of it). The software makes this awkward, because it knows that you already have a license of the first type, and assumes that you couldn’t possibly want to buy it again. The work-around is to get a new email address, a new Microsoft Live Account, and a new Gamer Tag, and use these to repurchase the license. You can’t just change the gamertag, because XBox live doesn’t let the same Microsoft Live account have two gamertags. And yes, I know, your buddies in the MMORPG you were playing know you by your gamertag, so you don’t want to change it.

Fourth US airline to go Wi-Fi: Aircell says they have a fourth airline--after American, Delta, and Virgin America--on board for its in-flight Wi-Fi service. The aerial broadband provider's latest partner will be announced soon. Aircell's service went live in 15 American Airlines planes two weeks ago, and there's been a surprising lack of reporting from regular travelers or journalists since the big splash at the launch.

Microsoft, two universities research methods for better Wi-Fi handoff for vehicles: The researchers developed a method they call Vi-Fi, writes the Seattle Post-Intelligencer's Todd Bishop, which allows a system to maintain connections with several base stations at once, using a primary access point for traffic until a discontinuity is predicted or encountered. This allows seamless handoffs and continuous voice conversations.

Speaking of autos and Wi-Fi, concerns raised about Chrysler's in-car Wi-Fi option: Randall Stross wrote nearly two weeks ago in The New York Times about the problem of distraction. With the Internet at your fingertips, can you restrain yourself? The only problem with the humorous and accurate analysis is that millions of business travelers have 3G access via laptop cards already, so you'd think we'd already be seeing the bad effects of automotive area networks.

A Wi-Fi booster can't post availability signs on highway: The Nebraska town of Louisville has free Wi-Fi downtown, and wanted to post "Visitor Wi-Fi" on a highway sign as another amenity. The state highway department has a policy that doesn't allow the promotion of Wi-Fi, because they believe they'd be inundated. A resident who runs a local Internet firm installed his own signs on the highway; the roads department removed them; he remounted them; they were removed again. The idea of zoning and mounting a billboard apparently hasn't come to the city officials' minds (or perhaps they're prohibited).

The folks spreading misinformation about Wi-Fi health effects cause Ulster school to disable network: I can understand why non-technical folks might think that Wi-Fi has been proven to be unsafe, given the kind of information that's available on the Internet about wireless safety. While there are ongoing studies about the safety of cellular signals--and I'm convinced at this point there's no increased risk to an adult's health by using a cell phone--there is no specific and credible research linked to Wi-Fi, which broadcasts signals at a far lower level than a cell phone, most of the time in most uses.

Washington state shuts down rest-area Wi-Fi: The $3 for 15 minutes, $7 per day, or $30 per month Wi-Fi service at 28 of Washington's 42 rest areas has been turned off after a year for lack of use. Figures. The fees charged by Parsons and Road Connect aren't unreasonable for a nationally scoped plan, but are ridiculous for limited use. States should either bite the bullet and offer these service for free, partner with national roaming operators who can resell service into large networks of business travelers, or use ads to support the service. Highways in remote areas can typically pick up cell data networks, and ongoing costs should be minimal to operate such networks.

IEEE approves fast-roaming standard, 802.11r: This new standard is designed to improve the handoff of devices between base stations. This is accomplished in part by allowing base stations to communicate security and quality of service information so that a VoIP over WLAN phone can immediately reassociate without the delay of authentication and other handshaking.

Denver airport sees 7,000 connections on a single day last week due to Democratic National Convention: FreeFi released the usage figures recently to show how their service is operating. The network started with about 600 daily users when the switchover from fee to free happened 10 months ago, and now carries about 3,500 daily connections.

Coffee Bean & Tea Leaf goes free: The chain of about 700 cafes will have free Wi-Fi installed by now in all its company-owned stores (about 300).

That's ASCII, not hex: An article on wardriving raises security hackles by repeating some slightly overheated statements about Wi-Fi security. The article opens with a 63-character ASCII WPA passphrase, which is later described as "hex." (ASCII passphrases in WPA can be up to 63 "printable" characters - ASCII 32 to 127 - while a hex version of a 256-bit TKIP or AES password is 64 hexadecimal digits long.) The article tries to conflate Wi-Fi attacks that led to the largest set of breaches in retail credit-card systems and wardriving, a hobbyist activity that's never been looked on very favorably by law enforcement. The sense of ennui of wardriving pioneers is pretty clear; when Wi-Fi is everywhere and generally secured, it's far less interesting. The wardriver in the article convinced the reporter that a maximum-length WPA passphrase stored on a USB drive for automatic use was the best way to go. But, really, 20 characters containing letters and punctuation and no words found in a dictionary along with changing your network's SSID (network name) provides all the security you'll ever need for a home or small business. (If you need more, deploy WPA/WPA2 Personal.)

Green Wi-Fi's Senegal efforts hit snags: The folks at Green Wi-Fi are well motivated, and they're running up against all forms of security theater and bureaucracy both here and in Senegal, where they have an active project. The San Francisco Chronicle notes the group's effort to build solar-powered, self-sustaining Internet access via mesh networked nodes. Getting devices out of the country, clearing customs in Senegal, and hooking up their solar system all hit problems they're working through. As with the One Laptop Per Child program, I see a "build it and they will come" mentality in Green Wi-Fi's mission statement: the notion that providing computing power and Internet access will result in good things, rather than an effort to figure out what good things need to be achieved, and whether computers and the Internet will assist.

So today Im recommending LoJack. Ive been using it on my Dell Laptop with Vista and it works well.

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I’ll have it up on the SpywareBiz site soon.

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