Hack a Day » anonymizer

Packet trace anonymization with PktAnon

Juan Aguilar — Sat, 12 Jul 2008 01:15:00 +0000

If you’re a network researcher or systems administrator, you know that network traces are often necessary, but not easy to share with colleagues and other researchers. To help with both ease of use and handling of sensitive information, the Institute of Telematics has developed PktAnon, a framework that anonymizes network traffic.

It works by using a profile-based scheme that supports various anonymization primitives, making it easy to switch between different network protocols and anonymization methods. New primitives can easily be added, and several pre-defined profiles are bundled into the distro. The profiles are all XML-based.

Essentially, there are two major uses for network traces: anonymizing user traffic in order to research it, and anonymizing in-house usage, thus preventing the leakage of sensitive information. It’s a rather rigid scheme, but using profiles for this was a stroke of genius that made it a lot easier, more flexible, and as a result, more useful and powerful.

[via TaoSecurity]
[photo: mlpoulter]

Anti-paparazzi sunglasses

Juan Aguilar — Sat, 28 Jun 2008 03:30:00 +0000

UPDATE: Video can also be found here.

Ah, the life of the work-a-day hacker: sure, it’s glamorous, but all the paparazzi dogging your every step can get unbearably stressful. Thankfully, you have a recourse with these anti-paparazzi sunglasses. They work by mounting two small infrared lights on the front. The wearer is completely inconspicuous to the human eye, but cameras only see a big white blur where your face should be.

Building them is a snap: just take a pair of sunglasses, attach two small but powerful IR LEDS to two pairs of wires, one wire per LED. Then attach the LEDs to the glasses; the video suggests making a hole in the rim of the glasses to embed the LEDs. Glue or otherwise affix the wires to the temples of the glasses. At the end of the temples, attach lithium batteries. They should make contact with the black wire, but the red wires should be left suspended near the batteries without making contact. When you put them on the red wire makes contact, turning the lights on. It’s functional, but we’re thinking that installing an on/off switch would be more elegant and it would allow you to wear them without depleting the batteries.

[via BoingBoing]

Anonymizing clothing

Juan Aguilar — Wed, 18 Jun 2008 04:00:00 +0000

Though much of [citizenFinerran]‘s intent in designing a suit that camouflages the wearer from security camera footage was philosophical, it is designed with a very tangible purpose in mind. The suit does not provide true camouflage (to say nothing of true invisibility), but it does create enough moving visual obstructions to make the wearer completely anonymous on film. More details on this and other invisibility cloaks after the break.

The idea is remarkably simple: [citizenFinerran]‘s suit is made of a jumpsuit fashioned from fiberglass screening with several blank ID cards halved and glued to the suit. The cards are not glued on firmly, but hang in a way that allows them to move as the wearer walks. The motion of the cards creates a visual effect that appears as pixelation on surveillance footage. Though the designer referenced and “imitated” several different methods of creating the pixelated appearance, all of those methods were actually implemented via software on the camera, not by an external hardware solution.

The closest thing to a working invisibility cloak in current development is the work of a team of students and professors at the University of Tokyo. It uses a a coat made of retro-reflective materials, a camera behind the wearer, and a projector. The digital camera captures the scenery behind the wearer and projects it onto the front, creating a form of camouflage on an opaque surface that resembles true invisibility. It’s not without limitations, though, as the projector would have to move with the person wearing the coat to achieve mobile cover. Even then it would only work on one side of the coat, leaving the other side completely exposed. Not really feasible unless a full body display was created.

If evading cameras is the goal, we feel a far more elegant fix is simply to cover your face with a hood or a gas mask. In addition to keeping your identity secret, a hood actually lines up with the philosophical imperatives behind [citizenFinerran]‘s project very well, and it’s less likely to get you beaten up.