Black Lives Matter - Action and Equality. ... Adafruit joins the Stop Hate for Profit campaign.

Cryptography Challenge! Code Wheel by IWorkInPixels #3dthursday


In 1553, Giovan Battista Bellaso invented an encryption scheme that was considered unbreakable for another 300 years. This method was later misattributed to Blaise de Vigenere, and is thus now known as the Vigenere cipher.

This method is a poly-alphabetic cipher, which means that the same letter may be encoded two different ways at different points in the message. This hides statistical data about letter frequency in the enciphered message. The Vigenere cipher does this by repeating a key word until it matches the length of the plaintext.

Normally, this enables one to look for repeating substrings in the enciphered message to guess at the key word length. Once key word length is known, possible key words can be guessed at, and once one letter of the key word is correct, it will unlock others.

If, however, the keyword is already as long or longer than the plaintext, then the Friedman test must be used to look for characters which have been enciphered using the same portion of the key and guess as to their meaning. The fact that the Friedman test doesn’t work well on short messages provides an additional resistance to cryptanalysis.

Today, this encryption method became printable. Thingiverse user iworkinpixels posted a code wheel which will allow users to encipher and decipher messages using the Vigenere cipher or the Caesar cipher. As an added bonus, he is offering a prize to the first person to successfully decrypt the ciphertext posted on the Thingiverse page!

My dad taught me this cipher when I was a kid, and I’ve wanted for a long time to make a printable code wheel that would allow others to learn the cipher. This is some sort of variant on the Vigenere cipher but I’m not sure of the actual name of this variant, so if anybody knows, please let me know in the comments! I know it is also related to the key autokey and Alberti ciphers.

In addition, I have a prize for the first person to correctly decrypt the ciphertext below and post the plaintext to the comments… I loved the steganography challenge in the Seej block, and it’s high time we had another contest… Good luck!

Oh, and you will find that brute force is not the way to go… there are 1.243841e 142 possible keys. 🙂

UPDATE: There is now a monocase alphas only ciphertext of the same plaintext, which reduces your keyspace down to 4.0329146e 26 possible keys.

-G},x3Pp__DPpqSk6’iF5]E0ww”QhV.yEei{b>~wu2)5ecNGGO^AF3w.ur!RE ]E>}.


Read more.


Every Thursday is #3dthursday here at Adafruit! The DIY 3D printing community has passion and dedication for making solid objects from digital models. Recently, we have noticed electronics projects integrated with 3D printed enclosures, brackets, and sculptures, so each Thursday we celebrate and highlight these bold pioneers!

Have you considered building a 3D project around an Arduino or other microcontroller? How about printing a bracket to mount your Raspberry Pi to the back of your HD monitor? And don’t forget the countless LED projects that are possible when you are modeling your projects in 3D!

The Adafruit Learning System has dozens of great tools to get you well on your way to creating incredible works of engineering, interactive art, and design with your 3D printer! If you’ve made a cool project that combines 3D printing and electronics, be sure to let us know, and we’ll feature it here!

We are angry, frustrated, and in pain because of the violence and murder of Black people by the police because of racism. We are in the fight AGAINST RACISM. George Floyd was murdered, his life stolen. The Adafruit teams have specific actions we’ve done, are doing, and will do together as a company and culture. We are asking the Adafruit community to get involved and share what you are doing. The Adafruit teams will not settle for a hash tag, a Tweet, or an icon change. We will work on real change, and that requires real action and real work together. That is what we will do each day, each month, each year – we will hold ourselves accountable and publish our collective efforts, partnerships, activism, donations, openly and publicly. Our blog and social media platforms will be utilized in actionable ways. Join us and the anti-racist efforts working to end police brutality, reform the criminal justice system, and dismantle the many other forms of systemic racism at work in this country, read more @

Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.

Join 20,000+ makers on Adafruit’s Discord channels and be part of the community!

Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Follow Adafruit on Instagram for top secret new products, behinds the scenes and more

CircuitPython – The easiest way to program microcontrollers –

Maker Business — How 3M is able to ramp up production of N95 masks

Wearables — Marker, meet flower

Electronics — Footprint Fail!

Python for Microcontrollers — The Python on Microcontrollers Newsletter: Adafruit CLUE, Nina and Thea, and much more! #Python #Adafruit #CircuitPython @circuitpython @micropython @ThePSF

Adafruit IoT Monthly — Repurposed Smart Home Displays, Open-Source 5G Networks, and more!

Microsoft MakeCode — Black Girls Code Virtual Camps

EYE on NPI — Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey

New Products – Adafruit Industries – Makers, hackers, artists, designers and engineers! — New Products 7/1/20 featuring Adafruit H3LIS331 Ultra High Range Triple-Axis Accelerometer – STEMMA QT / Qwiic!

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at !

No Comments

No comments yet.

Sorry, the comment form is closed at this time.