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Geeks for Privacy: Play Color Cipher and Visual Cryptography

Maybe the guys in Anonymous or Wikileaks can now use visual cryptography while using Snapchat to fool the NSA or CIA

Personally I think a browser with inbuilt backdoors to Tor Relays and data transfer by Bit Torrrents could be worthy a project too.

Quit the bullshit, Google- you are as evil as The Russian Communist Empire

I was just reading up on my weekly to-read list and came across this interesting method. It is called Play Color Cipher-

Each Character ( Capital, Small letters, Numbers (0-9), Symbols on the keyboard ) in the plain text is substituted with a color block from the available 18 Decillions of colors in the world [11][12][13] and at the receiving end the cipher text block (in color) is decrypted in to plain text block. It overcomes the problems like “Meet in the middle attack, Birthday attack and Brute force attacks [1]”.
It also reduces the size of the plain text when it is encrypted in to cipher text by 4 times, with out any loss of content. Cipher text occupies very less buffer space; hence transmitting through channel is very fast. With this the transportation cost through channel comes down.

ColorCipherBlocks

Reference-

http://www.ijcaonline.org/journal/number28/pxc387832.pdf

Visual Cryptography is indeed an interesting topic-

Visual cryptography, an emerging cryptography technology, uses the characteristics of human vision to decrypt encrypted
images. It needs neither cryptography knowledge nor complex computation. For security concerns, it also ensures that hackers
cannot perceive any clues about a secret image from individual cover images. Since Naor and Shamir proposed the basic
model of visual cryptography, researchers have published many related studies.

Visual_crypto_animation_demo

Visual cryptography (VC) schemes hide the secret image into two or more images which are called
shares. The secret image can be recovered simply by stacking the shares together without any complex
computation involved. The shares are very safe because separately they reveal nothing about the secret image.

Visual Cryptography provides one of the secure ways to transfer images on the Internet. The advantage
of visual cryptography is that it exploits human eyes to decrypt secret images .

ESPECIALLY SEE |THIS AND THIS

http://cacr.uwaterloo.ca/~dstinson/VCS-flag.html

and

http://cacr.uwaterloo.ca/~dstinson/VCS-pi.html

Even more fun—– visual cryptography using a series of bar codes – leaving the man in middle guessing how many sub images are there and which if at all is the real message

 

vispixel

References-

Color Visual Cryptography Scheme Using Meaningful Shares

http://csis.bits-pilani.ac.in/faculty/murali/netsec-10/seminar/refs/muralikrishna4.pdf

Visual cryptography for color images

http://csis.bits-pilani.ac.in/faculty/murali/netsec-10/seminar/refs/muralikrishna3.pdf

Other Resources

  1. http://users.telenet.be/d.rijmenants/en/visualcrypto.htm
  2. Visual Crypto – One-time Image Create two secure images from one by Robert Hansen
  3. Visual Crypto Java Applet at the University of Regensburg
  4. Visual Cryptography Kit Software to create image layers
  5. On-line Visual Crypto Applet by Leemon Baird
  6. Extended Visual Cryptography (pdf) by Mizuho Nakajima and Yasushi Yamaguchi
  7. Visual Cryptography Paper by Moni Noar and Adi Shamir
  8. Visual Crypto Talk (pdf) by Frederik Vercauteren ESAT Leuven
  9. http://cacr.uwaterloo.ca/~dstinson/visual.html
  10. t the University of Salerno web page on visual cryptogrpahy.
  11. Visual Crypto Page by Doug Stinson
  12. Simple implementation of the visual cryptography scheme based on Moni Naor and Adi Shamir, Visual Cryptography, EUROCRYPT 1994, pp1–12. This technique allows visual information like pictures to be encrypted so that decryption can be done visually.The code outputs two files. Try printing them on two separate transparencies and putting them one on top of the other to see the hidden message. http://algorito.com/algorithm/visual-cryptography

Visual Cryptography 

Ajay- I think a combination of sharing and color ciphers would prove more helpful to secure Internet Communication than existing algorithms. It also levels the playing field from computationally rich players to creative coders.

My Digital Trail

Someone I know recently mentioned that I have an extensive Digital Trail. I do.

I have 7863 connections at http://www.linkedin.com/in/ajayohri, 31 likes at https://www.facebook.com/ajayohri and 19 likes at https://www.facebook.com/pages/Ajay-Ohri/157086547679568, 409 friends (and 13 subscribers) at https://www.facebook.com/byebyebyer .On twitter I have 499 followers at http://twitter.com/0_h_r_1 and 344 followers at http://twitter.com/rforbusiness , and even on Google Plus some 617 people circling me at https://plus.google.com/116302364907696741272 (besides 6 other pages on G+)

Even my Youtube channel at http://www.youtube.com/decisionstats is more popular than I am in non-digital life. my non existant video blog at http://videosforkush.blogspot.com/ and my poetry blog at http://poemsforkush.wordpress.com/, and my comments on other social media, and my blurbs on my tumblr http://kushohri.tumblr.com/, and you get a lot of my psych profile.

Why do I do leave so much trail digitally?

For one reason- I was a bit of introvert always and technology set me free, the opportunity to think and yet be relaxed in anonymous chatter.

For the second reason- I am divorced and my wife got my 4 yr old son’s custody. Even though I talk to him once a day for a couple of minutes, somehow I hope when he grows, he reads my digital trail , maybe even these words, on the kind of man I was and the phases and seasons of life I went through.

 

That is all.

 

 

Secure Browsing from Mobile and PC ( Tor ,PeerNet, WasteAgain)

While Tor remains the tool of choice with pseudo-techie hacker wannabes , there is enough juice and smoke and mirrors on the market to confuse your average Joe.

For a secure browsing experience on Mobile – do NOT use either Apple or Windows OS

Use Android  and this app called Orbot in particular

Installing Tor with a QR code

Orbot is easy to install by simply scanning the following QR code with your Android Barcode scanner.

Android QR code

Installing Tor from the Android Market

Orbot is available in the Android Market.

ENTER PEERNET

If you have a Dell PC, well just use PeerNet to configure and set up your own network around the neighbourhood. This is particularly applicable if you are in country that is both repressive and not so technologically advanced. Wont work in China or USA.

http://support.dell.com/support/edocs/network/p70008/EN/vista_7/peernet.htm

What is a peer network?

A peer network is a network in which one computer can connect directly to another computer. This capability is accomplished by enabling access point (AP) functionality on one of the computers. Other computers can then connect to this computer in the same way that they would connect to a physical AP. If Internet Connection Sharing is enabled on the computer that has the AP functionality, computers that connect to that computer have Internet connectivity as well.

A basic peer network, which requires no networking knowledge or experience to set up, should meet the needs of most home users and small businesses. By default, a basic peer network is configured with the strongest available security (see How do I set up a basic peer network?).

For users who are familiar with wireless networking technology, advanced configuration features are available to do the following:

Change security settings (see How do I configure my peer network?)
Choose which method (push button or PIN) computers with Wi-Fi Protected Setup™ capability can join your peer network (see How do I allow peer devices to join my peer network using Wi-Fi Protected Setup technology?)
Change the DHCP Server IP address (see How do I configure my peer network?).
Change the channel on which to operate your peer network (see How do I configure my peer network?)

 If you are really really in a need for secure browsing (like you are maybe a big hot shot in the tech world), I suggest go over to VMWare

http://www.vmware.com/products/player/

create a seperate Linux (Ubuntu for ease) virtual disc, then download the Tor Browser Bundle from

https://www.torproject.org/projects/torbrowser.html.en for surfing and a Peernet (above) or  a prepaid one time use disposable mobile pre-paid wireless card. It is also quite easy to delete your virtual disc in times of emergencies (but it is best to use encryption even when in Ubuntu https://help.ubuntu.com/community/EncryptedHome)

IRC chat is less secure than you think it is thanks to BOT  Trawlers- so I am hoping someone in the open source community updates Waste Again for encrypted chats http://wasteagain.sourceforge.net/

What is “WASTE again”?

“WASTE again” enables you to create a decentralized and secure private mesh network using an unsecure network, such as the internet. Once the public encryption keys are exchanged, sending messages, creating groupchats and transferring files is easy and secure.

Creating a mesh

To create a mesh you need at least two computers with “WASTE again” installed. During installation, a unique pair of public and private keys for each computer is being generated. Before the first connection can be established, you need to exchange these public keys. These keys enable “WASTE again” to authenticate every connection to other “WASTE again” clients.

After exchanging the keys, you simply type in the computers IP address to connect to. If that computer is located behind a firewall or a NAT-router, you have to create a portmap first to enable incoming connections.

At least one computer in your mesh has to be able to accept incoming connections, making it a “public node”. If no direct connection between two firewalled computers can be made, “WASTE again” automatically routes your traffic through one or more of the available public nodes.

Every new node simply has to exchange keys with one of the connected nodes and then connect to it. All the other nodes will exchange their keys automatically over the mesh.

The Amazing Microsoft Robotics

Amazing stuff from the makers of Kinetic-

Operating systems of Robots may be the future cash cow of Microsoft , while the pirates of Silicon Valley fight fascinating cloudy wars! :)

http://www.microsoft.com/robotics/#Product

 

Product Information

Microsoft Robotics Developer Studio 4 beta (RDS4 beta) provides a wide range of support to help make it easy to develop robot applications. RDS4 beta includes a programming model that helps make it easy to develop asynchronous, state-driven applications. RDS4 beta provides a common programming framework that can be applied to support a wide variety of robots, enabling code and skill transfer.

RDS4 beta includes a lightweight asynchronous services-oriented runtime, a set of visual authoring and simulation tools, as well as templates, tutorials, and sample code to help you get started.

Microsoft Robotics Developer Studio 4 beta Datasheet – English (PDF Format)

Product VideoView the product video on Channel 9!

This release has extensive support for the Kinect sensor hardware throug the Kinect for Windows SDK allowing developers to create Kinect-enabled robots in the Visual Simulation Environment and in real life. Along with this release comes a standardized reference spec for building a Kinect-based robot.

See how Microsoft Robotics Developer Studio 4 beta is being used to bring ideas to life in the Microsoft Robotics@Home competition.

Lightweight Asynchronous ServicesOriented Runtime

Lightweight Asynchronous ServicesOriented Runtime

Concurrency and Coordination Runtime (CCR) helps make it easier to handle asynchronous input and output by eliminating the conventional complexities of manual threading, locks, and semaphores. Lightweight state-oriented Decentralized Software Services (DSS) framework enables you to create program modules that can interoperate on a robot and connected PCs by using a relatively simple, open protocol.

Visual Programming Language (VPL)

Visual Programming Language

Visual Programming Language (VPL) provides a relatively simple drag-and-drop visual programming language tool that helps make it easy to create robotics applications. VPL also provides the ability to take a collection of connected blocks and reuse them as a single block elsewhere in your program. VPL is also capable of generating human-readable C#.

DSS Manifest Editor

DSS Manifest Editor

DSS Manifest Editor (DSSME) provides a relatively simple creation of application configuration and distribution scenarios.

DSS Log Analyzer

DSS Log Analyzer

The DSS Log Analyzer tool allows you to view message flows across multiple DSS services. DSS Log Analyzer also allows you to inspect message details.

Visual Simulation Environment (VSE)

Visual Simulation Environment

Visual Simulation Environment (VSE) provides the ability to simulate and test robotic applications using a 3D physics-based simulation tool. This allows developers to create robotics applications without the hardware. Sample simulation models and environments enable you to test your application in a variety of 3D virtual environments.

The Best of Google Plus Week 3- Top 1/0

 

While the funny GIFs continue in week 3, I find more and more people using this to paste their blog articles- so another channel to create and spread content.

I am waiting for certain features-

  1. Importing my Orkut data seamlessly into Google Plus
  2. The Gaming Channel using Zynga- Open Social Games
  3. Hangout to have screen sharing as well as screen recording (or export to Youtube features)
  4. Better integration of Sparks based activity.
  5. Also if existing Youtube comments/fan communities can utilize G+ accounts too
Anyways, after all that violence and double talk- the best content in Week 3 as per my Google + stream.
Special Mention-

Youtube is coming Home

A continuing series on better design interfaces for my favorite music channel – You Tube

Some things I like.

The shrink- expand button.

The wasted space for advertisement – to the left of the video that is hugely static in terms of changes. It should be rotated more often.

The non existing average time of play- does everyone watch the whole video . or is the whole video watched 56 million times.

the inability to scroll and zoom into the video analytics.

the completely outdated comments button- which can be better used to create a SOCIAL community. but all it shows is top ranked comment, and click before dropping down. I liked the NYT approach to segmented comments including Editors Picks, Most Recommended, Highlights.

The video response feature that can be easily gamed to ensure video views /phishes.

The comments page numbers at the bottom instead of being at the top for the casual scanner of comments.

              Next

Facebook is the first button rather than second button in the minimum shared view list. Is that true? Can these buttons be self learning to my preferred social network instead of a default. (hint- use Google prediction API)

There is no provision to replay a video, unless you put into a playlist- which fortunately has been quite changed, even though the urls for playlists should have a separate url shortener than you.tube

A much better recommended playlist of related videos- they should be customized to the eclectic taste of the signed in user than the actual content. Maybe Try something like iTunes Genius feature.

No provision for a paid , premium channel even for countries that are blocked en masse from watching certain videos, hence depend on illegal video responses.

Youtube's variance in interface/s for sharing

Youtube seems to have a different  interface for sharing a channel, a playlist or an individual song. Also it seems to be missing out on revenue from Itunes (or maybe it isnt). and it seems to promoting Facebook and Twitter to the expense of other social media sharing buttons which can be only seen when you click share more (or maybe the buttons/social media channels change based on sharing activity analytics :) )

on a slightly different note read my techie tutorial on boosting your youtube channel views

http://decisionstats.com/2010/09/10/creating-an-anonymous-bot/

Creating an Anonymous Bot

 

See the following interface snapshots/views-

youtube song share expanded

youtube song share expanded

 

youtube song share

youtube song share default

youtube playlist share

youtube playlist share

utube channel share

youtube channel share

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