Category Archives: Security

Computers decode dog barks

It would seem we are only steps away from communicating with dogs in their own language through a voice decoder. The Discovery Channel reports on the latest success:

In one experiment, the software correctly classified the barks in 43 percent of cases. “Fight” and “stranger” barks were the easiest to recognize, while “play” barks were more difficult. When matched against a human’s ability to do the same, the computer’s success was about the same.

Pet behavioral analysis? I guess 43 percent is not bad. Now if humans could just understand each other more than 40 percent of the time…

You need an RFID-enabled rabbit, said Mr. Kitten

This BBC story is just too strange to believe:

“In the average house you have about 10,000 different objects and right now you have maybe three objects connected to the net – phone, computer and perhaps a rabbit,” he said.

“But we think that more and more objects are going to be connected,” said Mr Kitten.

A rabbit connected to the net? That is Jean-Francois Kitten, a spokesman for Violet, talking about a Nabaztag wi-fi rabbit gadget that can interpret RFID chips. Put a chip in front of the rabbit and it will “read” aloud. For example a book for children, or maybe a recipe for a cook.

The big question, I suppose, is whether Mr. Kitten will be tracking rabbit behavior. Is there a privacy-enabled rabbit?

Mediterranean Cable Break

Some people are starting to call this a “wake up call” because of the simplicity of the attack and the magnitude of the impact.

Apparently a ship is blamed for dragging its anchor across an undersea cable early this morning, causing widespread outages to Internet and voice traffic in Africa, the Middle East and Asia.

Renesys has a blog with some excellent details:

As you can see from the above map, there are several cable systems that connect Europe, the Middle East and Asia, via the Suez Canal. The countries highlighted in red are those whose Internet connectivity is being disrupted the most by this event. At Renesys, we geo-locate all routed networks and observe their reachability from over 250 locations around the globe. In the case of disasters like this, we will suddenly see a large percentage and/or a large number of country-specific networks disappear from the Internet. As the following charts show, Egypt and Pakistan lost the highest percentage of their networks, while India lost the least. However, India had the third highest total number of networks disappear. Looking at the cable map, it is not surprising that the Indian subcontinent was impacted by events off the coast of Egypt. There are essentially two ways to get to this part of the world: via the Suez Canal or via Southeast Asia.

Pakistan and Egypt report outages of seventy percent or more. I have been working on a number of projects with offices in Asia. None appear directly affected by this incident, but obviously we’re taking another hard look at redundancy requirements.

Teflon Gets Heat from Environmentalists

If I asked you what a normal cooking temperature was, could you tell me within ten degrees of accuracy; what about fifty degrees of accuracy?

I am certainly not the best chef. I confess I have no idea what the exact temperature of a frying pan is when I put it on medium, or medium-high, high, etc..

Now consider the latest news from the Environmental Working Group on Teflon:

For the past fifty years DuPont has claimed that their Teflon coatings do not emit hazardous chemicals through normal use. In a recent press release, DuPont wrote that “significant decomposition of the coating will occur only when temperatures exceed about 660 degrees F (340 degrees C). These temperatures alone are well above the normal cooking range.”

I see. So the normal cooking range is below 660 degrees F. The only problem with DuPont’s reasoning is that most people probably do not know this and regularly cook above the level that they consider “normal”. Safety suddenly comes into play, and yet I would bet not a single DuPont teflon user has any idea of the risks:

In new tests conducted by a university food safety professor, a generic non-stick frying pan preheated on a conventional, electric stovetop burner reached 736°F in three minutes and 20 seconds, with temperatures still rising when the tests were terminated. A Teflon pan reached 721°F in just five minutes under the same test conditions (See Figure 1), as measured by a commercially available infrared thermometer. DuPont studies show that the Teflon offgases toxic particulates at 446°F. At 680°F Teflon pans release at least six toxic gases, including two carcinogens, two global pollutants, and MFA, a chemical lethal to humans at low doses. At temperatures that DuPont scientists claim are reached on stovetop drip pans (1000°F), non-stick coatings break down to a chemical warfare agent known as PFIB, and a chemical analog of the WWII nerve gas phosgene.

Personally, I have never liked teflon because I felt the risks were not clearly discussed or identified and so I have only bought stainless steel cookware. Come to think of it, I have not owned teflon for over fifteen years. When I first started looking for safety data and could not find anything conclusive, I steered clear. I also never understood the idea that it could peel off if you touched it with metal, like a normal fork or spoon. What kind of “hard” surface requires you to replace all your cutlery?

This general unease now turns out to be well founded.

Unless you can monitor your temperatures and/or install controls to keep teflon below 660 degrees F, there are some serious health risks to consider. I guess I will stick to stainless steel for now (pun intended).