Become a fan of Slashdot on Facebook

 



Forgot your password?
typodupeerror

Slashdot videos: Now with more Slashdot!

  • View

  • Discuss

  • Share

We've improved Slashdot's video section; now you can view our video interviews, product close-ups and site visits with all the usual Slashdot options to comment, share, etc. No more walled garden! It's a work in progress -- we hope you'll check it out (Learn more about the recent updates).

×

Comment: Branches like bells after an ice storm (Score 3, Interesting) 790

by mattr (#48785439) Attached to: Ask Slashdot: Sounds We Don't Hear Any More?

Tree branches ringing against each other like crystal bells after an ice storm. Once every 1 or 2 years in Northern New Jersey we would have an ice storm. It would completely coat trees in a thick layer if solid ice. The next day the world would be utterly silent, save for the tinkling and chiming of branches as unsern breezes would bang them against each other. For that matter, simply walking unplowed snowy streets with hardly anyone around, snow crunching underfoot is very rare to me. But I think due to global warming perhaps we don't get ice storms that crystallize the tree branches, or the 3 feet of snow I remember.

Comment: Keypunch machine (Score 1) 790

by mattr (#48784313) Attached to: Ask Slashdot: Sounds We Don't Hear Any More?

The CHUNK-CHUNK-CHUNK of a keypunch machine. It has a keyboard and each time you type a letter, an oblong hole is punched into a Hollerith card. When I was in elementary school maybe 35 or so years ago I was lucky enough to be able to take weekend classes in Fortran at a giant high school that had a whole room sized system. One card for one line of code, and throw out one if you make a typo. You could write on them. You put a stack of cards into a hopper on the reader machine and then could run the program. I Don't remember if it had a screen.
Anyway, let me tell you that was a VERY satisfying sound that makes a visceral thud through the table and your hands on the keyboard. I miss it.
That school - Allendale HS in New Jersey - had a real planetarium with two-lobed projector too where I learned some basic astronomy. It was a wonderful experience that had big impa ct on me.
This seems to be an emulator!
http://ed-thelen.org/comp-hist...
http://x3270.bgp.nu/x026.html

Encryption

Security Company Tries To Hide Flaws By Threatening Infringement Suit 124

Posted by Soulskill
from the because-that-always-ends-well dept.
An anonymous reader writes: An RFID-based access control system called IClass is used across the globe to provide physical access controls. This system relies on cryptography to secure communications between a tag and a reader. Since 2010, several academic papers have been released which expose the cryptographic insecurity of the IClass system. Based on these papers, Martin Holst Swende implemented the IClass ciphers in a software library, which he released under the GNU General Public License.

The library is useful to experiment with and determine the security level of an access control system (that you own or have explicit consent to study). However, last Friday, Swende received an email from INSIDE Secure, which notified him of (potential) intellectual property infringement, warning him off distributing the library under threat of "infringement action." Interestingly, it seems this is not the first time HID Global has exerted legal pressure to suppress information.

Comment: Augmented sensing (Score 1) 120

by mattr (#47901875) Attached to: The Challenges and Threats of Automated Lip Reading

Could augment by adding other sensors such as microwave, laser or terahertz imaging, to detect signals being generated by tongue and vocal cords, or even to directly image the organs themselves.
Also it seems possible that since tge whole head vibrates, reflections or motions of eye, nose lips and forehead might provide vibratory cues.

"Nature is very un-American. Nature never hurries." -- William George Jordan

Working...