Showing posts with label encryption. Show all posts
Showing posts with label encryption. Show all posts

3D Printing Parts for Cryptocurrency Mining Rig

Cryptocurrency mining is booming again with Ethereum currently being one of the most mined coins. In many countries graphics cards (GPUs) used for the process are hard to find or are much more expensive. For mining purposes, several cards are mounted on a single motherboard with a riser connector and attached to an open external rig for more space to get better cooling air flow.
Most mining rigs are self-built by the operators who always want to get the best price to quality ratio.

Here are a few very practical 3D printable DIY modules you can make yourself and use in your setup.


Here is a somewhat typical mining rig but all the connections of metal profiles and structural elements (red and black plastic) were 3d printed:































Youmagine project page with all the instructions and files:

https://www.youmagine.com/designs/ether-open-air-rig


If you don't want to keep your GPUs on a riser connected to a rigid frame to get more space or flexible arrangements for better cooling, you can use DIY 3d printed card holders.































MMF project page wit all the files:

https://www.myminifactory.com/object/gpu-mining-rig-38870


Here is a different type of vertical GPU holder with focused ventilation opening:




























Thingiverse page:

https://www.thingiverse.com/thing:2409114


Using 3d printing to build your hashing beast is a great way to ensure spare and replacement parts and it gives you much more customization options. You can also get various type of fan holders, air flow focusers, PC component holders, and many other components.


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If you want to start mining, but don't have the hardware, you can start cloud mining on Genesis for as low as 30USD for a two year period:

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3D Printable WW2 Enigma Machine Replica

Pascal and his students made a replica of WW2 Enigma encryption machine with 3d printed mechanism. It is a very interesting project and you will learn something more about encryption.





















All the code, files and instructions can be found at:

https://pascalr2blog.wordpress.com/3d-printing/enigma-replica/

https://www.thingiverse.com/thing:1813308

https://pascalr2blog.wordpress.com/3d-printing/enigma-replica/how-it-works/


Here are two videos that explain Enigma machine and the science behind it:




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

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