Showing posts with label security. Show all posts
Showing posts with label security. Show all posts

Object steganography method to hide data in shape of 3d printed objects

Ingenious and cool process designed by Noah Feehan of hiding data in 3d printed object. Shape itself can then be scanned for information to be extracted and decrypted.

Physical object IS encrypted data carrier, carrying it in its shape. I could not find more detailed or software itself, however concept is intriguing and deserves attention and further exploration.

From source site:
Object Steganography, Noah Feehan (2012)

Steganography is the practice of concealing one form of information within the properties of another; it has been used as a way of hiding information in plain sight for thousands of years.
“Object Steganography” is a series of parametrically-designed 3d printed objects: the shape of each piece is determined by a user-submitted word.
For example, one of the objects pictured here is the most common password in the world; the other is an illegal number.
Further work in this series will close the loop between computer fabrication and computer vision: Each object will be scanned back into a programming environment and decoded.

Object steganography software and .stl file generated





Pictures of 3d printed objects with data in their shape:

3d printed object with most common password data embedded in its form

3d printed object containing Illegal Number data encrypted in its shape 

Source:

http://p-dpa.tumblr.com/post/71516057042/object-steganography-noah-feehan-2012 via http://go3dprinting.tumblr.com/

I also googled it anf found a site that could be THE source: http://akamediasystem.com/2012/05/object-steganography/


There is a software project that encrypts .stl files:

http://diy3dprinting.blogspot.com/2013/12/disarming-corruptor-3d-model-encryption.html


Disarming Corruptor 3d model encryption software

Disarming Corruptor is Mac OSX software that can encrypt your .stl files and render them unrecognizable.




From the source article:

According to Plummer-Fernandez his new software, named “Disarming Corruptor”, was born from a frustration with online 3D printing clearinghouses. While trying to upload an artistic rendition of Mickey Mouse to iMaterilize, algorithms within the site rejected the model on the grounds of copyright infringement.
Plummer-Fernandez was further frustrated when he learned Thingiverse had decided to remove / ban 3D models of weapons on their site.
In an interview with Forbes, Plummer-Fernandez expressed his deep concern: “I was confronting all these taboos showing up in 3D-printing around copyrighted material and 3D-printed weapons, and I think these services are leaving their users out to dry.”
In Plummer-Fernandez’s mind, the only way to fix this problem was to subvert the model uploading process by encrypting the designs.
The way it works is pretty simple. A user with any model, whether it be contraband or not, imports their .stl file into the Disarming Corruptor software. Once imported, seven factors that determine a model’s polygon arrangement can be distorted to render the model unrecognizable. At the same time, the software generates a 7-digit code which can be shared within secure communities, allowing downloaders to unencrypt the model.
According to Cody Wilson, founder of 3D printed gun maker Defense Distributed, “[Disarming Corruptor]explodes the idea that there will be certain shapes we can guard against. Information itself is plastic, and it can be molded and changed”.
Source:

http://www.engineering.com/3DPrinting/3DPrintingArticles/ArticleID/6599/Hiding-Contraband-in-Encrypted-3D-Models.aspx

From project page:

Disarming Corruptor is a tool for making reversible damage to your STL mesh file. This means you can obliterate it into something totally unrecognizable, share it online under its new guise, and selectively distribute the key code to recipients so they can reverse the damage and retrieve the original object.

In a time of prolific online espionage, crackdowns on file-sharing, and a growing concern for the 3D printing of illegal items and copyright protected artefacts, DC is a free software application that helps people to circumvent these issues. Inspired by encryption rotor machines such as the infamous Enigma Machine, the application runs an algorithm that is used to both corrupt STL files into a visually-illegible state by glitching and rotating the 3D mesh, and to allow a recipient to reverse the effect to restore it back to its original form. The file recipient would need both the application and the unique seven digit settings used by the sender, entering the incorrect settings would only damage the file further.

When patent trolls and law enforcement agencies find these files on sharing sites they will only see abstract contortions, but within the trusting community these files will still represent the objects they are looking for, purposely in need of repair. It could also be used to symbolically decommission files and throw away the keys, or to make something inoperative yet still recognisable so that other users would have to request a key to put it into use.

Project page:

http://www.plummerfernandez.com/Disarming-Corruptor

This is interesting software but I don't see it is strong protection. 7 digit code seems easy to brake with brute force attacks, and .stl sharing sites can easily recognize "messed up" files. True encryption that would change the appearance of a file in something recognizable (ie. encrypting IP protected shape into something that looks like simple toy) would be much harder.







Update:

here is a concept of encrypting data into the shape of 3d printed objects:

http://diy3dprinting.blogspot.com/2014/01/object-steganography-method-to-hide.html

First fully 3d printed rifle - The Grizzly

Today is a day full with news about 3d printed guns. After article about first commercially available 3d printed metal rifle part I saw this video on Google+ stream. Looks like 3d printed weapons are evolving very fast. Who knows what future will hold ...




From video description:

This is a fully 3D printed rifle I designed. I call it The Grizzly after the Canadian built Sherman Tanks of WWII. It is a single shot .22LR incorporating the coiled mainsprings of the Liberator by Defence Distributed. Like the Liberator the only metal is a 1" roofing nail.
In this first test it fired off a Winchester Dynapoint but the barrel split along both sides for about 2" and the top of the receiver split the same amount.



























Via:
http://3dprintsoftheworld.com/object/grizzly-3d-printed-rifle

3D printed knives projects

This post will compile news and data about 3d printed knives and blades.

This was the first video of 3d printed knife I saw:

I don't see it is good for anything except cake cutting.





Update (28.2.2014):

here is another 3d printed tanto style blade in ABS by Barancules. You can open cardboard boxes with it ... still, far away from usable knife IMHO



























Here is  karambit style blade:




Update (16.3.2015.):

... and then someone has to ruin it for everyone ...
As 3dprint.com reports, mechanical engineering student at École de technologie supérieure in Montreal, Canada, named Antoine Rancourt Poulin made a hidden real knife blade with 3d printed comb attachment and handle. Probably highly illegal as concealed weapon ...




Source: http://3dprint.com/51252/3d-printed-comb-knife/

Update (24.4.2015.):

Group of Dutch students wanted to show security flaws and smuggled two 3d printed knives into a courtroom of the Palace of Justice in Den Bosch. The whole thing was done with courts permission as a sort of a test.
3D printed knives were tested to show that they can cut, stab and potentially hurt someone.








What is next? Taking some sharp wood sticks or stones trough metal detector to "prove" some sort of security threat?

From the source:
According to the court’s spokeswoman Ilse Westenenk, the courtroom regularly works together with the college. ‘That’s why we gave them permission, but obviously after checking they were actual Avans students,’ she said.
The spokeswoman further revealed that the court was already aware of these loopholes in the security system, but added that this experiment will not lead to a tightening of security.
‘We have known for some time that knives of this kind cannot be detected by metal scanners. 3D printed weapons simply require other security measures. But for now we will uphold the current balance between security and transparency,’ she said. The courtroom and its corridors are also patrolled by security personnel.
Source and more info: http://www.3ders.org/articles/20150424-dutch-students-smuggle-3d-printed-knives-into-court-to-prove-a-security-flaw.html


Update (23.6.2015.):

I attended an event about 3d printing in Osijek, Croatia and in a bunch of 3d printed stuff I saw a small 3d printed knife of the same design as used by Dutch students. I took a look and it seems completely useless. I don't think it would be capable of opening a paper envelope. Maybe it could be used to cut some very soft cheese. Waste of time. you can see it in picture bellow:



Update:

Here is a dagger printed on professional Stratasys SLS printer probably in nylon powder. Not much information is available. The source is unknown. It looks like Klingon design :-)







































Update:

here you can see a knife prototype or fantasy prop developed and 3d printed/painted by SoupCan13

http://soupcan13.deviantart.com/art/Lil-Chopper-Knife-Prototype-324898124

























Update:

Here is a serious and fully functional sharp metal knife 3d printed by laser sintering in titanium. The knife was developed for a sailing team as a safety tool. It must be very expensive.







Full article:

http://www.mojosail.com/2013/11/26/star-trek-safety-knives-for-team-new-zealand/


Here is a DIY steak knife printed in some unknown organometallic filament which looks like more usable eating utensil but still bends:





Here is a kitchen knife printed with Protopasta's HTPLA carbon fiber filament by Josh Huges. It "cuts" the fruit and veggies but it is probably not so sharp.


3d printed ATM skimmer found

Looks like someone used 3d printer to print out very realistically looking ATM parts to read out card data and capture PIN numbers. Skimmer was found in July of 2011 on Chase Bank ATM in West Hills, California.
IMHO: I somehow see criminals using it as sign of 3d printing technology paradigm changing power


More pictures and info on:
http://krebsonsecurity.com/2011/12/pro-grade-3d-printer-made-atm-skimmer/

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