Month: June 2008

EM Brace For Sensing Magnetic Fields

June 19, 2008 by 7 Comments


We’ve discussed the notion of using machines to add or improve sensory input to the body before, and we’ve found another project with the same idea. [Nick Hasty] has developed an object he calls the EM Brace, which allows the user to sense electromagnetic fields with a wave of the hand.

The device works by connecting two antennas to an enclosure that contains a speaker. The enclosure is intended to be worn on the back with a harness securing it in place and wrapping the arms around the wearer’s body. The antennas are incorporated into a pair of gloves. When the antennas pick up electromagnetic radiation, the speaker emits a low frequency sound waves. They vibrate the enclosure and the arms, which in turn vibrate the body, signaling to the wearer that he or she is in an electromagnetic field, also referred to as hertzian space. A good deal of detail about the project can be found on his blog, or if you prefer, download his thesis paper in(PDF).

[via Make]

Eavesdropping Encrypted Compressed Voice

June 19, 2008 by 1 Comment


A team from Johns Hopkins University has discovered a way to eavesdrop on encrypted voice streams. Voice data like the kind used by Skype for its VoIP service sends encrypted packets of varying sizes for different sounds. The team learned that by simply measureing the size of the packets, they could determine what was being said with a high rate of accuracy. VoIP providers often use a variable bit rate to use bandwidth more efficiently, but it is this compression that makes audio streams vulnerable to eavesdropping.

The team’s software is still in its early stages of development, yet incapable of parsing entire conversations. It is capable, though, of finding pre-determined keywords and inferring common phrases bases on the words it detects. It also has a higher rate of accuracy in identifying long complicated words than short ones. The team’s goal was not to eavesdrop, but to expose the vulnerability; team member [Charles Wright] notes, “we hope we have caught this threat before it becomes too serious.”

[via Schneier on Security]
[photo: altemark]

3-digit Frequency Meter

June 19, 2008 by 5 Comments


Flow sensors are useful tools for collecting data on the rate of liquid usage, but they need a device to display the data they collect. This three digit frequency meter was designed by [Turbokeu] to do just that, converting a Swissflow SF800 flow sensor’s square wave signal (similar to fan RPM signals) into an numerical expression of liters per minute on a 3 digit LCD. Fan RPM is

[Turbokeu] provides detailed schematics of different configurations for the frequency meter as well as schematics of the layouts of the two PCBs that are used. Even if you don’t have an immediate use for a frequency meter, his clean and readable schematics are worth a look in their own right. The display is installed on front of a tower case along side a CPU speed display.

[via YourITronics]

SparkFun’s Logic Level Converter

June 19, 2008 by 10 Comments


SparkFun has always been good about designing and stocking useful breakout boards. This recently added Logic Level Converter is no exception. It’s uses two BSS138 MOSFETs to shift 5V logic levels to 3.3V. The board handles two separate serial pairs. Just hook up the RX and TX on either side. Provide power at both voltages and the board will happily do the conversion. It’s $2, smaller than the size of a quarter, and perfect for plugging into a breadboard.

OpenSUSE 11.0 Reviewed

June 19, 2008 by 7 Comments


Download squad has posted a thorough review of OpenSUSE 11.0. Previous versions of the Linux distro were plagued by thorny and confusing installations, but OpenSUSE 11.0 installs much more easily and cleanly. After a few standard configuration screens, the user has several options for admin accounts, disk partitions, dual-boot setups, and more. The installation of the OS files takes about 20 minutes from there, followed by a quick reboot and first boot, making for a highly customizable yet speedy install from start to finish.

The other major problem with previous versions was the inconsistent speed of their package handling system. In 11.0, though, a new command line app called Zypper makes installing updates, patches, and other packages much faster.

The final verdict is that OpenSUSE 11.0 has become a viable alternative to Ubuntu; the overall quality of the open source distro was never in question, but now that speed has gone from being its biggest deficiency to being one of its biggest strengths, we expect to see a lot more chameleons in the wild.

The Last HOPE Full Speaker List Released

June 19, 2008 by No comments


The Last HOPE has just released a list of all the schedule talks at the conference. 97 different talks will be divided over three tracks during the course of the three day conference. It looks like a lot of interesting events will be going down. The Cold Boot encryption attack tools will be released. Representatives from Graffiti Research Lab will be showing The Complete First Season and unveiling their One Laser Tag Per Child system. Virgil Griffith from WikiScanner will be mining even deeper into the wretched hive of scum and villainy. Karsten Nohl will present why hardware obfuscation is an impossibility and how they defeated the MiFare crypto. The Last HOPE will be in New York City July 18-20, 2008

Wii Menu 3.3 Already Circumvented

June 19, 2008 by 3 Comments


Well, that didn’t take long. Three days after the release of the Wii Menu 3.3 update (which prevents homebrew loading on the Wii by killing a special hack), the update has been circumvented. The update targeted the ubiquitous Twilight Hack, which allows homebrew software to be loaded from the Wii’s SD card slot by using a special game save. The team at HackMii were quick to disassemble, analyze, and scoff at the update, with member [bushing] quipping “we are not impressed.” The team found bug exploits for new code in the the update that cause it to ignore the Twilight Hack. They have yet to release the fix to the public, but its likely that they’ll do so at least as fast as they developed it.

[via Wii Fanboy]
[photo: cibomahto]