Thursday, March 4, 2010

Pay Credence to Credant's Claims on Sleeping Wi-Fi?

Pay Credence to Credants Claims on Sleeping Wi-Fi?

Credant, a UK firm that sells data encryption tools, claims thieves sniff Wi-Fi in laptops stored in cars: I've been letting this percolate for a couple of days in my head, and would appreciate comments from those of you who know the nitty-gritty. Credant is claiming that thieves can use Wi-Fi detectors to find laptops in cars that have Wi-Fi active, because some laptops don't go to sleep for 30 minutes after the lid is closed or sleep is activated. (Thus, Credant says you need to have encryption software installed to prevent access to data, rather than, say, fix your system or add a car alarm.)

Here's my problems with this scare-via-press release:

I don't know of any operating system and laptop combo that keeps a machine awake for long after the lid is closed unless the OS is highly misconfigured or there's an error.

Wi-Fi detectors don't pick up clients to my knowledge, only beacons from access points. (If a client were running XP in its old, bad mode in which ad hoc network names were being advertised, perhaps the laptop would be detectable.)

Laptops in a case in a car would produce very little detectable signal, and the Wi-Fi detectors I'm aware of have very little directionality. 2.4 GHz sniffers with two antennas might be far more reliable.

Apple's Wake on Demand feature relies on a Wireless Multimedia Mode (WMM) option which I have no idea how widely implemented it is beyond Mac OS X 10.6 (Snow Leopard). Wake on Demand keeps a tiny bit of juice fed to the Wi-Fi module to listen for a wake command from an Apple base station, but I don't believe the adapter is broadcasting.

Any other ideas? Or is this just plain scaremongering?



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More Details on Amtrak's New Acela-Fi

More Details on Amtraks New Acela-Fi

A couple of reports on the new service Amtrak launched in the Northeast: Amtrak's offering free Wi-Fi in six stations and on the Acela line that runs between Boston and D.C.

More Details on Amtraks New Acela-Fi

From the Washington Post, Rob Pegoraro runs through some of the details he's found out. On trains, streaming services are blocked, and some content is filtered, without complete disclosure. There's no excuse for avoiding full disclosure. Pegoraro saw rates of 1 Mbps down and 200 Kbps up from the aggregated mobile broadband service.

Nomad Digital's backend is being used, which can take signals from multiple 2G/3G operators to piece together continuous coverage. I imagine the firm uses a virtual network that uses proxies on both ends to allow a continuous IP connection regardless of the intervening network pieces. The user has no awareness of this, and remote sites maintain connections via the proxies.

The service in stations is quite a bit higher, with Pegoraro measuring 3 Mbps/600 Kbps. Regular correspondent Klaus Ernst, an inveterate tester of new Wi-Fi systems around Manhattan, measured 8 Mbps/1.8 Mbps at Penn Station. (Splash screen courtesy Klaus.)

A report from Canada's Globe & Mail indicates that Via Rail's Internet service could use more robustness, where cellular doesn't fully cut it. The firm that operates Via, 21net, only uses cellular connections on the Windsor-to-Quebec City route over which Internet is available. That's what the train operator wants. 21net recommends adding satellite for reliability.



Amtrak Launches Wi-Fi on Acela and in StationsChris Brown praised for picking up rubbish

Virgin Mobile Ups Data for On-Demand Broadband

Virgin Mobile is keeping its pricing tiers for its pay-when-you-need it broadband service, but bumping up included quantities of data: Virgin Mobile, now part of Sprint Nextel, has a unique 3G service, in which you can pay for limited amounts of data for limited periods of time. No contracts, and no other fees. And the division is upping the amount of data at each tier starting this morning.

Formerly, you could pay $10 to use up 100 MB within 10 days; with a 30-day usage period, you could pay $20 for 250 MB, $40 for 600 MB, and $60 for 1 GB. There are no overage fees because you are prepaying for a specific quantity of service. If you need more, you just buy another chunk.

The revised plan sticks with the $10/100 MB/10 days tier, but ups the data for each 30-day usage option: $20 gets you 300 MB (only a 50 MB increase), $40 gets you 1 GB (up 400 MB), but $60 now covers 5 GB or 400 percent more usage.

Virgin Mobile Ups Data for On-Demand Broadband

The $60 plan is identical in cost and data quantity to the contract-based 3G laptop service provided by AT&T, Sprint Nextel, T-Mobile and Verizon Wireless, but there's no commitment. (T-Mobile also allows you to pay full price for a USB modem and then pay on a month-by-month basis.)

I suspect Virgin bumped up these numbers because as a better deal it encourages more regular purchases without feeding out much more data. I suspect most people paying for 1 GB never reach that total, and that offering 5 GB won't encourage much more consumption relative to the jump in usage.

Just as carriers have all seemed to spawn prepaid, supercheap voice offerings--all fees are collected before usage--I expect we'll see more prepaid 3G, too. Postpaid plans are supposedly billed after the fact, but all the voice and 3G data contracts I know of required a month's advance prepayment of subscription fees, but allow you to run a tab for overages during the month of usage and then pay for those. Hardly postpaid, despite the definition of postpaid.

The plans all require the $100 Broadband2Go USB Device (a Novatel Ovation MC760 with microSD slot). The USB modem works over Sprint Nextel's network at EVDO Rev. A speeds where available, and supports several Windows flavors and Mac OS X 10.3 and later. (Some commenters on Virgin's open-answer FAQ say 10.4 is the minimum supported version.)



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Tuesday, March 2, 2010

Netgear Raises Ante on Streaming HD over 802.11n

Netgear hasn't set the price of its new paired HD video adapters, but promises 99.9 percent reliability for multiple 1080p streams: The High-Performance Wireless-N HD Home Theater Kit, which will ship in Q3 2010, uses a 4-by-4 MIMO array to achieve the results Netgear claims, and I'm inclined to believe them. The company says it can push 40 Mpbs across multiple streams using these adapters, with the video sources being the Internet, IPTV systems, or other devices on the network. The adapters plug into Ethernet ports, and have a simple pairing mechanism.

The 4-by-4 array over 5 GHz coupled with the paired adapter method means that Netgear doesn't need to focus on throughput but coverage and consistency. The extra antennas let them use space-time block coding and other techniques to boost marginal signals and reduce errors in transmission. The device doesn't compress data, so the entire goal is to achieve sustained throughput.

Of course, Netgear could charge $500 for the pair, which would make them ridiculous, but I suspect a price closer to $250 based on how other devices have been marketed in the past, and the target audience for these products. A third adapter can apparently be used to extend coverage further.

Netgear also announced a May release at $79 of the 802.11n (2.4 GHz) Universal WiFi [sic] Internet Adapter, a driver-free Ethernet-to-Wi-Fi bridge that can be powered by a USB port even though no data is handled over USB (it saves a power adapter). The notion here is that instead of buying branded, proprietary adapters, you can just plug into Ethernet.



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Monday, March 1, 2010

Meraki Offers Browser-Based Wi-Fi Sniffer

Meraki offers up a Java tool for viewing Wi-Fi networks around you: The Meraki WiFi Stumbler is a browser-based tool for using your computer's 802.11 adapter to scan the air around you and report the SSID, MAC address (BSSID), 802.11 standard (g, n, etc.), channel, signal strength, maker (if known from MAC address), and security standards used. This is the first browser-based tool that I've seen that replicates the functionality needed to make channel selection and siting choices.

Because of the Java requirement, the tool works only in browsers like Firefox, Internet Explorer, and Safari that support Java. For some reason, only Windows and Mac are currently supported; Linux is not, but that might relate to the state of monolithic driver support in the open-source kernel. You can use the stumbler without an Internet connection in Firefox 3.5 only.

I made a very short screencast showing how it works. Looks like I was wrong in what I said in the screencast: there were simply no 5 GHz networks in the vicinity for a long time (I spotted one later); my desktop Mac does have 802.11n capability.




Apple announce 10 billionth download winnerAmtrak Launches Wi-Fi on Acela and in Stations

Amtrak Launches Wi-Fi on Acela and in Stations

Amtrak Launches Wi-Fi on Acela and in Stations

Amtrak's promise last year of putting Internet service in Acela trains happened quite quickly: For a chronically underfunded government-like operation, Amtrak managed to get Wi-Fi installed fast in its Northeast high-speed Acela line after it said it planned to do so. The service, free for the interim, is in all 20 Acela trains. Amtrak has also made Wi-Fi service free in the six stations that serve Acela, and in Acela lounges. (The Wilmington Station will get unwired when renovations are completed in early 2011.)

Amtrak may wind up using Wi-Fi as yet another tool to bring passengers out of the air and onto the ground. With Wi-Fi at no cost in stations and on trains, the rail operator could use that as a marketing campaign against $7 to $10 per day airport and $5 to 13 per flight airline Internet access, where that's available.

Nomad Digital and GBS Group built the service out. Nomad has a many year history of train-Fi. Nomad and competitor Icomera are responsible for most of the train-based Internet access in the world. A few other firms have disappeared during that time or exited the business.



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Indie Hotspots Could Perish in UK for Piracy Law

A UK law under consideration and much reviled by privacy advocates would make independent Wi-Fi hotspots legally indefensible: The Digital Economy Bill is a particularly odious piece of legislation that attempts to enforce copyright by requiring ISPs to keep records and disconnect customers who engage in such acts.

This puts the government in the business of taking people off the Internet by enforcing actions for what would otherwise be civil violations, previously needing to be proved in court. Now, something approximating an assertion and a few letters could cause an ISP that doesn't respond appropriately to face huge fines and other troubles. A similar law in France was initially struck down as unconstitutional, but was modified lightly before being approved.

The reason for these laws is to keep media industries from engaging in publicity-adverse lawsuits against individuals, such as those the RIAA (Recording Industry Association of America) led against college students, children, and dead people before sputtering out and moving to this approach.

The not-quite-unintentional consequence of the UK law would, according to advice provided by an arm of the government, put undue burden on hotspots, libraries, and academic institutions. The law requires that most parties be either subscribers (end users) or ISPs; ISPs primarily provide access, and subscribers use it, although there are some fine points. In either case, copyright holders can notify ISPs of violations who are required to notify subscribers. After a small number of violations, the subscriber can be disconnected from any Internet service for some period of time.

If someone downloads an allegedly pirated video over a library, university, or hotspot could force that institution off line if it failed to meet specific notification terms; it's unclear how a hotspot could restrict a banned user without imposing high bars for access, whether free or fee. Larger operations could have login and credit-card verification requirements--used mostly as a way to block people instead of allow them.

Danny O'Brien of the Electronic Frontier Foundation previously raised this concern on 2 December 2009 in a post to the EFF's site: "The repeated demand by the entertainment industry that intermediaries should police their networks has been expanded by the bill to include the subscribers on the edge of the network. If you're not an ISP, but other people use your network to get their net access — if you run an open Wi-Fi spot, for instance, like the British Library — you'll now be vulnerable to being terminated or constrained by the actions of those users."

None of these efforts, of course, deters privacy. As Cory Doctorow, a UK resident and editor of BoingBoing, wrote about this issue:

"The Digital Economy Bill is being sold to us on the grounds that copyright infringement harms the British economy because of the importance of our entertainment industry. But while the measures in the DEB won't stop copyright infringement (copying isn't going to slow down -- as computers and the technology they enable gets cheaper and more widely distributed, copying will continue to speed up, just as it has done since the dawn of the computer industry), they will harm British business and British families, by making the Internet generally less useful and more difficult and more expensive for honest people to use."

In the US, we don't have such a law underway--as far as I'm aware--but media firms have struck deals with some ISPs (and some ISPs have refused) to engage in the same sort of behavior without government involvement.



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