https://community.wolfram.com RSS Feed for Wolfram Community showing any discussions tagged with Cryptography sorted by active. https://community.wolfram.com/groups/-/m/t/3763738 ![Evaluating Black-Box Physics Through Optical Emulation][1] &[Wolfram Notebook][2] [1]: https://community.wolfram.com//c/portal/getImageAttachment?filename=bracelet.png&userId=3760415 [2]: https://www.wolframcloud.com/obj/a69cbbc1-44d8-4d3b-a1e1-2029814fd159 Hubert Kołcz 2026-07-17T12:40:37Z https://community.wolfram.com/groups/-/m/t/3749919 ![Encrypting, decrypting, and breaking cellular automata-based stream ciphers][1] &[Wolfram Notebook][2] [1]: https://community.wolfram.com//c/portal/getImageAttachment?filename=Screenshot2026-07-08at3.49.01%E2%80%AFPM.png&userId=3733966 [2]: https://www.wolframcloud.com/obj/de1f51eb-6f1a-40d0-bd9e-96e0091bfb3b Morgan Bergstrom 2026-07-09T16:00:26Z https://community.wolfram.com/groups/-/m/t/3732049 ![Breaking the Vigenère cipher from first principles][1] &[Wolfram Notebook][2] [1]: https://community.wolfram.com//c/portal/getImageAttachment?filename=BreakingtheVigen%C3%A8reCipherfromFirstPrinciples.gif&userId=20103 [2]: https://www.wolframcloud.com/obj/51ecece9-4a92-49c8-b0b7-ad7f8be79d9f Marco Thiel 2026-06-11T18:23:47Z https://community.wolfram.com/groups/-/m/t/3707223 [![Breaking elliptic curve crypto: an exploration of quantum oracles and phase estimation for secp256k1][1]][1] &[Wolfram Notebook][2] [1]: https://community.wolfram.com//c/portal/getImageAttachment?filename=5730Breakingellipticcurvecryptoanexplorationofquantumoraclesandphaseestimationforsecp256k1.png&userId=20103 [2]: https://www.wolframcloud.com/obj/39c803e5-2ba2-46f6-adbf-1e5b7ce01869 Mohammad Bahrami 2026-04-28T13:42:23Z https://community.wolfram.com/groups/-/m/t/3638617 ![Hash Functions from Deterministic Graph Walks][1] &[Wolfram Notebook][2] [1]: https://community.wolfram.com//c/portal/getImageAttachment?filename=6123image.png&userId=911151 [2]: https://www.wolframcloud.com/obj/4d835e39-0644-4eb6-82a2-5d0f245c6b86 Wolfram Education Programs 2026-02-11T16:29:47Z https://community.wolfram.com/groups/-/m/t/3217599 ![enter image description here][1] &[Wolfram Notebook][2] [1]: https://community.wolfram.com//c/portal/getImageAttachment?filename=Capture.PNG&userId=3217537 [2]: https://www.wolframcloud.com/obj/elvinaliou/Published/lavalampanalysis.nb Elvina Liou 2024-07-11T23:21:03Z https://community.wolfram.com/groups/-/m/t/3532726 I have sensitive security machine parameters in my calculation input cells. I'd like to hide input cells and permanently lock them so that other users cannot open or see my input cells. I want that other users can use slide bars and numeric input window in Manipulate [ ] function but I have to hide and lock the details of calculations to protect the security machine parameters. I know that we can hide Input Cells using the following code, but other users can still open it by double clicking the right cell bracket or editing the notebook. CreatePalette[ Column[{Button[ "Hide code", {NotebookFind[SelectedNotebook[], "Output", All, CellStyle]; FrontEndExecute[ FrontEndToken[SelectedNotebook[], "SelectionCloseUnselectedCells"]]}], Button["Show code", NotebookFind[SelectedNotebook[], "Input", All, CellStyle]]}]] How can I create, hide, lock, and distribute my notebook without revealing the details of calculations? Yeonjoon Park 2025-08-18T20:47:24Z https://community.wolfram.com/groups/-/m/t/3501955 ![enter image description here][1] &[Wolfram Notebook][2] [1]: https://community.wolfram.com//c/portal/getImageAttachment?filename=Cellular.png&userId=3486421 [2]: https://www.wolframcloud.com/obj/09d734e3-8239-4fff-80e3-d3d608e739a9 Derrick Kwan 2025-07-10T20:33:32Z https://community.wolfram.com/groups/-/m/t/3502411 ![Finding cellular automata rules given the center column and initial state][1] &[Wolfram Notebook][2] [1]: https://community.wolfram.com//c/portal/getImageAttachment?filename=Screenshot2025-07-10165257.png&userId=3500038 [2]: https://www.wolframcloud.com/obj/b11b8b66-2d0a-487f-a909-7f9451fa74c5 Azalea L 2025-07-10T20:59:07Z https://community.wolfram.com/groups/-/m/t/3381079 ![Post-quantum hashing using chaotic double pendulum dynamics][1] &[Wolfram Notebook][2] [1]: https://community.wolfram.com//c/portal/getImageAttachment?filename=5029proj-7-cover.jpeg&userId=20103 [2]: https://www.wolframcloud.com/obj/7279ca34-97b2-45f2-b1ee-581057e1f2a3 Wolfram Education Programs 2025-02-05T14:52:03Z https://community.wolfram.com/groups/-/m/t/3363308 &[Wolfram Notebook][1] [1]: https://www.wolframcloud.com/obj/3685446d-eed9-4556-a7ce-d151ab603dcd Peter Hecht 2025-01-23T20:04:24Z https://community.wolfram.com/groups/-/m/t/3351570 &[Wolfram Notebook][1] [1]: https://www.wolframcloud.com/obj/02099404-b5e3-4326-bded-1b5c4105ce0d Shenghui Yang 2025-01-05T20:56:29Z https://community.wolfram.com/groups/-/m/t/3117219 ![enter image description here][1] &[Wolfram Notebook][2] [1]: https://community.wolfram.com//c/portal/getImageAttachment?filename=fw54hsdvsasdadsfv.jpg&userId=11733 [2]: https://www.wolframcloud.com/obj/42077220-2fbc-44d5-b411-7de6967733ac Charles Stevens 2024-02-06T19:43:46Z https://community.wolfram.com/groups/-/m/t/802967 Awesome. That's my one-word summary of [HackUPC][1] this past weekend. Seeing 400 international students take the initiative to turn dreams into reality was an inspiring experience for me and my twin brother [@Jofre Espigule][at0]. ![enter image description here][2] **Friday's night opening ceremony at the Sports Pavilion of *Universitat Politècnica de Catalunya*.** ![Opening Talk][3] Hack UPC took place in UPC's North Campus in sunny Barcelona. And it was made possible thanks to [Miquel Llobet][4] (founder of Hack UPC), the [Major League Hacking][5], the sponsors (Wolfram, Skyscanner, Everis,...), and an amazing team of volunteers. Here are the [TravelDirections][6] to Hack UPC: ![HackUPC venue][7] Jofre and I got some cool Wolfram swag to give away. We also demoed a bunch of code examples to people interested in the the [Wolfram Language][8]. And we helped several teams that came to us with great ideas. Below is one of the hacks I demoed there, a "Weather Station in a Snap" similar to [@Arnoud Buzing][at1] Arduino Yún [weather station][9] but using the new [Sense HAT][10] for the [Raspberry Pi][11]. hat = DeviceOpen["SenseHAT"]; bin = CreateDatabin[]; RunScheduledTask[DatabinAdd[bin,<|"temp" -> DeviceRead[hat, "Temperature"], "hum" -> DeviceRead[hat, "Humidity"], "pres" -> DeviceRead[hat, "Pressure"]|>], 120] ![Weather Station][12] Temperature, humidity and pressure measurements were being added in a regular basis at this databin: https://wolfr.am/aDkxtY91. Now let's take a look at some great Wolfram projects done by students at Hack UPC. The first project that I want to share with you was about cryptography. And it was carried out by two students, Xavier Perranau and Arnau Bordas. Right after signing in to [WOLFRAM DEVELOPMENT PLATFORM][13] they got familiarized with functions covered in the WLanguage Guide about [Cryptographic Number Theory][14]. Their next step consisted in developing a cloud service to allow users send encrypted messages. And after some trial and errors, they ended up adapting the example [Hide Secret Messages in Images][15] from the [WL Code Gallery][16]. They called their project [Steganography a la Wolfram][17] which allows users to drag and drop an image in two cloud-deployed [FormFunction][18] to wether hide a text message on it or decipher a message previously inserted in the image. Here is how it works. A function called **InsertSecretMessage** is defined to insert a string into a photo: InsertSecretMessage[carrierImage_Image, mesg_] := Block[{carrierBytes, pixelChannels, secretBits, secretBytes}, carrierBytes = BitAnd[ImageData[carrierImage, "Byte"], 254];secretBits = Flatten[IntegerDigits[ToCharacterCode[ToString[mesg, InputForm, CharacterEncoding -> "ASCII"]], 2, 8]]; secretBytes = Fold[Partition, PadRight[Join[IntegerDigits[Length[secretBits], 2, 48], secretBits], Times @@ Dimensions[carrierBytes]], Reverse[Rest[Dimensions[carrierBytes]]]]; Image[carrierBytes + secretBytes, "Byte"]] Then, an [advanced FormFunction][19] with four fields named "Message","Image","ByEmail" and "SendTo" is cloud-deployed with the **InsertSecretMessage** function added inside a conditional to see if the user wants to send the image by email with [SendMail][20] or just generate it on the Wolfram Cloud: CloudDeploy[FormFunction[{"Message"->"String","Image"->"Image","ByEmail"->{True,False}, "SendTo"-><|"Interpreter"->"EmailAddress","Input"->"nomail@exemple.com"|>}, If[#ByEmail==True,SendMail[#SendTo,{"Email from Wolfram",InsertSecretMessage[#Image,#Message]}],InsertSecretMessage[#Image,#Message]]&, AppearanceRules-><|"Title"->"Wolfram Steganography Insertion","Description"->"Insert your plaintext message here and we will add it to the image of your choice."|>, FormTheme->"Black"],"insert",Permissions->"Public"] https://www.wolframcloud.com/objects/user-bb7ad2a9-a624-45e5-a867-8da9c0832887/insert ![insert][21] To get back the previously given string, an **ExtractSecretMessage** function is declared and inserted in the following simple [FormFunction][22]. ExtractSecretMessage[img_Image] :=Block[{secretData, messageLength}, secretData = Flatten[BitAnd[ImageData[img, "Byte"], 1]]; messageLength = FromDigits[Take[secretData, 48], 2]; secretData = Partition[Drop[secretData, 48], 8]; ToExpression[ FromCharacterCode[FromDigits[#, 2] & /@ Take[secretData, messageLength]]] ] CloudDeploy[FormFunction["Image"->"Image",ExtractSecretMessage[#Image]&, AppearanceRules-><|"Title"->"Wolfram Steganography Extraction","Description"->"Insert your image here and you will get the Text"|>, FormTheme->"Black"],"extract",Permissions->"Public" ] https://www.wolframcloud.com/objects/user-bb7ad2a9-a624-45e5-a867-8da9c0832887/extract ![extract][23] The project awarded with the **Skyscanner Prize** was [GrooveScanner][24]: *quality events on a budget because planning just got easy*. A project developed by a group of polish students that consisted in building a service that searches for cheapest most convenient flight and nearest accommodation to the venue requested. What makes it unique is the combination of Skyscanner API and [Wolfram Alpha API for Transportation][25]. ![GrooveScanner][26] ![WA airports][27] **Finally, the project that won the Best Use of Wolfram Tech Award was** .... [DriveFlyTeleport][28]! *Sightseeing: The Smart Way*. Given three main constrains which are: time, money and the topics a person is interested in, the system determines which places in the area (museums, monuments, places of interest in general) are the best fit. It uses a [Wolfram Cloud API][29] and a twitter handle of any given user to get the text content from his timeline and analyze it to see which of the travel options may fit him best: https://github.com/adamszewe/HackUPC-Wolfram ![DriveFlyTeleport][30] Congratulations to all HackUPC participants for coming up with such amazing projects! http://hackupc2016.devpost.com/submissions [at0]: http://community.wolfram.com/web/jofreep [at1]: http://community.wolfram.com/web/arnoudb [at2]: http://community.wolfram.com/web/sherlock [1]: http://hackupc2016.devpost.com/ [2]: http://community.wolfram.com//c/portal/getImageAttachment?filename=CbmzybPWwAAN8rk.jpg&userId=56204 [3]: http://community.wolfram.com//c/portal/getImageAttachment?filename=Opening.jpg&userId=56204 [4]: https://twitter.com/mllobet [5]: https://mlh.io/ [6]: https://reference.wolfram.com/language/ref/TravelDirections.html [7]: http://community.wolfram.com//c/portal/getImageAttachment?filename=CbleDr1VIAEiXw7.png&userId=56204 [8]: http://www.wolfram.com/language/ [9]: http://blog.wolfram.com/2015/03/17/build-your-own-weather-station-in-a-snap-with-the-wolfram-cloud/ [10]: http://reference.wolfram.com/language/ref/device/SenseHAT.html [11]: http://www.wolfram.com/raspberry-pi/ [12]: http://community.wolfram.com//c/portal/getImageAttachment?filename=Weather.png&userId=56204 [13]: https://www.wolfram.com/development-platform/ [14]: http://reference.wolfram.com/language/guide/CryptographicNumberTheory.html [15]: https://www.wolfram.com/language/gallery/hide-secret-messages-in-images/ [16]: https://www.wolfram.com/language/gallery/ [17]: http://devpost.com/software/steganography-a-la-wolfram [18]: http://reference.wolfram.com/language/ref/FormFunction.html [19]: http://reference.wolfram.com/language/tutorial/AdvancedWebFormCreation.html [20]: https://reference.wolfram.com/language/ref/SendMail.html [21]: http://community.wolfram.com//c/portal/getImageAttachment?filename=insert.png&userId=56204 [22]: http://reference.wolfram.com/language/ref/FormFunction.html [23]: http://community.wolfram.com//c/portal/getImageAttachment?filename=extract.png&userId=56204 [24]: http://devpost.com/software/groovescanner [25]: https://www.wolframalpha.com/examples/Transportation.html [26]: http://community.wolfram.com//c/portal/getImageAttachment?filename=1939grooveScanner.jpg&userId=56204 [27]: http://community.wolfram.com//c/portal/getImageAttachment?filename=WA_airport_info.jpg&userId=56204 [28]: http://devpost.com/software/driveflyteleport [29]: https://reference.wolfram.com/language/guide/CreatingAnInstantAPI.html [30]: http://community.wolfram.com//c/portal/getImageAttachment?filename=DriveFlyTeleport.jpg&userId=56204 Bernat Espigulé 2016-02-25T18:07:31Z https://community.wolfram.com/groups/-/m/t/3261317 ![New record in elliptic curves by Elkies - Klagsbrun: rank 29][1] &[Wolfram Notebook][2] [1]: https://community.wolfram.com//c/portal/getImageAttachment?filename=4298Hero.png&userId=20103 [2]: https://www.wolframcloud.com/obj/32166e9d-50ba-44af-9116-759ac472d375 Ed Pegg 2024-08-30T16:39:46Z https://community.wolfram.com/groups/-/m/t/3217589 ![A depiction of data bits using a hypercube graph][1] &[Wolfram Notebook][2] [1]: https://community.wolfram.com//c/portal/getImageAttachment?filename=Screenshot%28484%29.png&userId=20103 [2]: https://www.wolframcloud.com/obj/4dcb8d2e-e22d-40e3-bbed-c756ebe09bc2 Disha Sanganeriya 2024-07-11T23:19:28Z https://community.wolfram.com/groups/-/m/t/3216644 ![Multiway Graph representing the evolution of a CA rule][1] &[Wolfram Notebook][2] [1]: https://community.wolfram.com//c/portal/getImageAttachment?filename=THUMBNAIL.png&userId=3153760 [2]: https://www.wolframcloud.com/obj/cc93a941-3a05-4030-a3d4-574e3ae4ae75 Kevin Toren 2024-07-11T21:13:59Z https://community.wolfram.com/groups/-/m/t/3200409 ![Graph comparing Index of Coincidence of Text with an Expected Version][1] &[Wolfram Notebook][2] [1]: https://community.wolfram.com//c/portal/getImageAttachment?filename=.jpg&userId=3169183 [2]: https://www.wolframcloud.com/obj/edb533bc-4b7b-4320-9a19-272b31f1b6b5 Theo Vine 2024-06-26T18:54:11Z https://community.wolfram.com/groups/-/m/t/3166774 ![Representing or encrypting text with Truchet tiling - the visualization][1] &[Wolfram Notebook][2] [1]: https://community.wolfram.com//c/portal/getImageAttachment?filename=ezgif-3-9e90e4d847.gif&userId=11733 [2]: https://www.wolframcloud.com/obj/a2a820da-1ed7-4ecf-8085-f37da7662f2e Vitaliy Kaurov 2024-04-30T05:59:51Z https://community.wolfram.com/groups/-/m/t/3164170 &[Wolfram Notebook][1] [1]: https://www.wolframcloud.com/obj/eee1281f-98e6-4fe4-92ae-78b46a9b31ac Peter Burbery 2024-04-25T19:38:51Z