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11 items tagged "bob"
Related tags:
hacks [+],
quantum cryptography [+],
quantum [+],
liu sebastien sauge [+],
home [+],
eve [+],
cryptography [+],
chaos communication congress [+],
avalanche photodiodes [+],
attack [+],
alice [+],
workstation [+],
website [+],
way [+],
vintage [+],
turning [+],
trio [+],
trash [+],
timer [+],
slides [+],
ranger bob [+],
ranger [+],
radio [+],
rachel [+],
props [+],
oscar [+],
orange box [+],
nightlights [+],
missing fingers [+],
look [+],
linear amplifiers [+],
linear amplifier [+],
leds [+],
led [+],
iterations [+],
insecure [+],
headset [+],
handset [+],
halloween props [+],
halloween [+],
h bridge [+],
gps [+],
ghoulish [+],
geocache [+],
fingerless gloves [+],
equipment friends [+],
diy [+],
design contest [+],
design [+],
couple [+],
conversions [+],
contests [+],
computer geeks [+],
computer [+],
cnc [+],
classic [+],
cellphones [+],
building [+],
box [+],
bob bob [+],
bob berg [+],
bob alexander [+],
bluetooth [+],
bejesus [+],
amplifier [+],
555 timer projects [+],
12v halogen [+]
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![Permalink for 'CNC conversions with [Bob]'](/themes/lilina/web//media/mark_off.gif)
8:54
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Hack a Day
[Bob Berg] emailed in to request that we take a look at his website. We did, and we liked what we saw! [Bob] has done a couple CNC mill conversions and documented the process quite thoroughly. The first one listed on his site is a Sieg x-3, seen above. [Bob] explains that the first thing [...]
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7:01
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Hack a Day
[Ranger Bob] crafted this great looking Reverse Geocache box. Our favorite feature is the black piece of acrylic on top. It’s laser cut (not sure if the letters are engraved or not) and gives a great finished look while hiding a couple of things at the same time. The orange box is a metal cash [...]
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9:01
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Hack a Day
[Bob Alexander] wrote in to share a hobby of his that we thought was pretty timely considering the new year is quickly approaching. For several years now he has put together a custom calendar for himself, including both dates he finds important along with sweet pictures of vintage computer equipment. Friends and family found his [...]
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14:02
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Hack a Day
[Bob] had a couple of bright, 12V halogen spotlights in his hallway that didn’t get much use. Rather than toss them out or leave them sitting idle, he decided to replace the bright bulbs with dimmer LEDs that he could keep lit through the night. He opened up the spotlights, removing the bulbs and the [...]
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3:54
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Hack a Day
Last year [Bob] didn’t let the little kids get some candy and continue on their way without giving them quite a fright first. His modified trashcan lures you in and then scares the bejesus out of you. He calls it Oscar the Trash-bot. The image on the left shows a ghoulish-looking head peeking out of [...]
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14:02
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Hack a Day
[Rachel's] Bluetooth glove is proving that you don’t have to be missing fingers to talk to the hand. You can see in the video after the break that, like us, she wears fingerless gloves while typing to keep the cold from causing pain in her hands (it’s so cold in here it’s like we’re [Bob [...]
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7:58
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Hack a Day
[Bob] has been busy lately putting the finishing touches on three different projects that he plans on entering into the 555 Design Contest. His first entry is a low-power H-bridge, which can be used to drive small servos. While he admits that it is a bit odd to build use a 555 timer to construct [...]
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13:00
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Hack a Day
We know way too little about this subject but hopefully [Bob4analog] helped us learn a little bit more this time around. He’s building his own linear amplifiers on what looks like sheets of MDF. This is an evolving design and the two videos after the break show two different iterations. He’s salvaged several components, like [...]
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21:02
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SecDocs
Authors:
Qin Liu Sebastien Sauge Tags:
cryptography quantum cryptography Event:
Chaos Communication Congress 26th (26C3) 2009 Abstract: This presentation will show the first experimental implementation of an eavesdropper for quantum cryptosystem. Although quantum cryptography has been proven unconditionally secure, by exploiting physical imperfections (detector vulnerability) we have successfully built an intercept-resend attack and demonstrated eavesdropping under realistic conditions on an installed quantum key distribution line. The actual eavesdropping hardware we have built will be shown during the conference. Quantum cryptography, as being based on the laws of physics, was claimed to be much more secure than all classical cryptography schemes.(Un)fortunately physical hardware is not beyond of an evil control: We present a successful attack of an existing quantum key distribution system exploiting a photon detector vulnerability which is probably present in all existing devices. Without Alice and Bob losing their faith in their secure communication, we recorded 100% of the supposedly secret key. Single photon detectors based on passively quenched avalanche photodiodes are used in a number of quantum key distribution experiments. A vulnerability has been found in which these detectors can be temporarily blinded and then forced to produce a click [1]. An attack exploiting this vulnerability against a free-space polarization based quantum cryptosystem [2,3] is feasible. By controlling the polarization of a bright beam the eavesdropper Eve can force any detector of her choice to fire in the legitimate receiver Bob, such that she gets a full control of it without introducing additional errors. This allows Eve to run an intercept-resend attack without getting caught, and obtain a full copy of the transmitted secret key. We have fully demonstrated this attack under realistic conditions on an installed fiber optic quantum key distribution system. The system uses polarization encoding over 290 m of optical fiber spanning four buildings. A complete eavesdropper has been built, inserted at a mid-way point in the fiber line, and 100% of the secret key information has been recorded. Under attack, no significant changes in the system operating parameters have been observed by the legitimate users, which have happily continued to generate their 'secret' key.
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21:02
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SecDocs
Authors:
Qin Liu Sebastien Sauge Tags:
cryptography quantum cryptography Event:
Chaos Communication Congress 26th (26C3) 2009 Abstract: This presentation will show the first experimental implementation of an eavesdropper for quantum cryptosystem. Although quantum cryptography has been proven unconditionally secure, by exploiting physical imperfections (detector vulnerability) we have successfully built an intercept-resend attack and demonstrated eavesdropping under realistic conditions on an installed quantum key distribution line. The actual eavesdropping hardware we have built will be shown during the conference. Quantum cryptography, as being based on the laws of physics, was claimed to be much more secure than all classical cryptography schemes.(Un)fortunately physical hardware is not beyond of an evil control: We present a successful attack of an existing quantum key distribution system exploiting a photon detector vulnerability which is probably present in all existing devices. Without Alice and Bob losing their faith in their secure communication, we recorded 100% of the supposedly secret key. Single photon detectors based on passively quenched avalanche photodiodes are used in a number of quantum key distribution experiments. A vulnerability has been found in which these detectors can be temporarily blinded and then forced to produce a click [1]. An attack exploiting this vulnerability against a free-space polarization based quantum cryptosystem [2,3] is feasible. By controlling the polarization of a bright beam the eavesdropper Eve can force any detector of her choice to fire in the legitimate receiver Bob, such that she gets a full control of it without introducing additional errors. This allows Eve to run an intercept-resend attack without getting caught, and obtain a full copy of the transmitted secret key. We have fully demonstrated this attack under realistic conditions on an installed fiber optic quantum key distribution system. The system uses polarization encoding over 290 m of optical fiber spanning four buildings. A complete eavesdropper has been built, inserted at a mid-way point in the fiber line, and 100% of the secret key information has been recorded. Under attack, no significant changes in the system operating parameters have been observed by the legitimate users, which have happily continued to generate their 'secret' key.
1337day (was: Inj3ct0r, 1337db)
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