From Droid Life: Google Introduces “Bouncer” Security Service for Android: Shows Massive Drop in Malicious Downloads, Calls Out Anti-Malware Companies

Moments ago, Google unveiled a security service that has been working behind the scenes on Android for a few months now, codenamed Bouncer. The service allows the Android Market to scan apps that have been uploaded, analyze them for trojans or other malware, and then determine if they have tendencies that would lead them to misbehave. Again, this has been going on for months to protect you, Google is just now letting you know about how successful it has been.

Here is the full explanation from Google:

The service performs a set of analyses on new applications, applications already in Android Market, and developer accounts. Here’s how it works: once an application is uploaded, the service immediately starts analyzing it for known malware, spyware and trojans. It also looks for behaviors that indicate an application might be misbehaving, and compares it against previously analyzed apps to detect possible red flags. We actually run every application on Google’s cloud infrastructure and simulate how it will run on an Android device to look for hidden, malicious behavior. We also analyze new developer accounts to help prevent malicious and repeat-offending developers from coming back.

Also in this announcement for Bouncer, Google managed to take a shot at the anti-spyware and security companies that you hear from constantly in the Android world. During their testing of this new security service, Android Market stats showed a 40% drop in potentially malicious apps being downloaded during 2011. That comes on the heels of numerous reports from anti-spyware companies that malware is constantly on the rise, something many of us have questioned all along.

Here is the exact quote:

The service has been looking for malicious apps in Market for a while now, and between the first and second halves of 2011, we saw a 40% decrease in the number of potentially-malicious downloads from Android Market. This drop occurred at the same time that companies who market and sell anti-malware and security software have been reporting that malicious applications are on the rise. While it’s not possible to prevent bad people from building malware, the most important measurement is whether those bad applications are being installed from Android Market – and we know the rate is declining significantly.

Lastly, Google wants to make sure you understand how Android works on the security front and that it has been designed to make malware less potent. Some of the security measures include:

  • Sandboxing: The Android platform uses a technique called “sandboxing” to put virtual walls between applications and other software on the device. So, if you download a malicious application, it can’t access data on other parts of your phone and its potential harm is drastically limited.
  • Permissions: Android provides a permission system to help you understand the capabilities of the apps you install, and manage your own preferences. That way, if you see a game unnecessarily requests permission to send SMS, for example, you don’t need to install it.
  • Malware removal: Android is designed to prevent malware from modifying the platform or hiding from you, so it can be easily removed if your device is affected. Android Market also has the capability of remotely removing malware from your phone or tablet, if required.

Feeling safer already?

Via:  Google Mobile

from Droid Life

From Discover Magazine: [HED: How to Turn a Cockroach into a Fuel Cell] | Discoblog

spacing is important
Discoid cockroaches, used in this study, can be up to 3 inches long

From the digestive system that demolishes glue and toothpaste comes the first living, breathing, and yes, digesting cyborg-insect-biofuel-cell. Researchers have created a fuel cell that needs only sugar from the cockroach’s hemolymph and oxygen from the air to make electric energy. As long as the cockroach keeps eating, the fuel cell keeps running.

LiveScience lays out how electrodes inserted into the cockroach’s abdomen hijack its biochemical machinery:

The fuel cell consists of two electrodes; at one electrode, two enzymes break down a sugar, trehalose, which the cockroach produces from its food. The first of the two enzymes, trehalase, breaks down the trehalose into glucose, then the second enzyme converts the glucose into another product and releases the electrons. The electrons travel to the second electrode, where another enzyme delivers the electrons to oxygen in the air. The byproduct is water.

The cockroaches are not much harmed by the electrodes. “In fact,” says lead author Michelle Rasmussen, “it is not unusual for the insect to right itself and walk or run away afterward,” which only further confirms our suspicion that cockroaches can resist anything. …

from Discover Magazine

From MAKE: An Open Source Laser Sintering 3D Printer

Additive rapid prototyping in plastic materials is becoming quite accessible to home and hobby users. If you’re a hobbyist on a typical budget wanting to rapid prototype in metal, however, you’re limited to subtractive methods, i.e. CNC machine tools like mills and lathes, and even those are not exactly “cheap.” Professional 3D printing services like Shapeways offer additive metal prototyping in metals like stainless steel and gold, but it’s extremely expensive. The technology their 3D printers use, called “laser sintering,” is fundamentally different from the RepRap-type fused-filament (“robot hot glue gun”) 3D printers at the “garage” end of the pricing scale.

In selective laser sintering (SLS), the object is built up in a bed of powder by a scanning laser beam that fuses tiny bits of the powder together, one layer at a time. After each layer of the model is fused, a fresh, thin, uniform sheet of powder is swept over the bed for printing the next layer.

Swarthmore College engineering student Andreas Bastian has developed a low-cost, open-source laser sintering printer design. It uses an IR laser diode on a bed of powder made from a mixture of wax and carbon, and produces fused wax models, which can then be duplicated in metal, for instance aluminum, using a traditional lost-wax casting process. I have written before about a similar process that uses a CNC hot-wire cutter to make Styrofoam models that can then be “metallized” via lost-foam casting, but that, too, is a subtractive process, and limits the possible shapes of the model in ways that the additive SLS process does not. [via Hack a Day]

 

from MAKE