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Straddling Checkerboard

Transcript: The Straddling Checkerboard Wed. 1/May/2019 Emily Bracamonte What is the straddling checkerboard It is a type of cipher code that is used to convert an alphabet to numbers In this case, the substitutions are of variable length. When this cipher is combined with other methods of encryption, the straddling checkerboard can be quite strong It is a Substitution Cipher What's so important about it? Why is it Important It has formed a component of several important field ciphers, the most notable being the VIC cipher used by Russian spies during the cold war. This cipher can be very strong when joined with other ciphers as mentioned before. This can be helpful when trying to send a message in the best way possible without any other people trying to encrypt it without permission. Steps on how the Straddling Keyboard works How does it work? Remember Step 3 Step 4 Remember... We will be left with just a simple substitution. Not every key will be able to decrypt every message, e.g. the example keys above cannot have 38, 39, 78 or 79 in the cipher text. Every key will have a set of numbers that it cannot decrypt. If these numbers occur in the cipher text, we know the key can't have been used to encipher it, so we can get rid of the key. It turns out that we don't need to check all the positions of the second 2 blanks, as soon as we find a set of positions for them that work we can just use it, as they all give equivalent substitution ciphers. Only the positions of the first 2 blanks matter. Step 1 Step 1 The key for a straddling checkerboard is a permutation of the alphabet e.g. 'fkmcpdyehbigqrosazlutjnwvx', along with 2 numbers e.g. 3 and 7. A straddling checkerboard is set up something like this The first row is set up with the first eight key letters, leaving two blank spots. It has no row label. The second and third rows are labeled with whichever two digits didn't get a letter in the top row, and then filled out with the rest of the key letters. Since there are 30 slots in our grid, and we missed two letters in the first row, there will end up being two spare in the other rows. It doesn't matter where these spares go. Step 2 Step 2 To encipher, a letter on the top row is simply replaced by the number labeling its column. Letters on the other rows are replaced by their row number, then column number: So, DEFEND THE EAST WALL OF THE CASTLE becomes 690975672309938377275387070360723094383772709. This may be sent directly, but usually is first input into a second cipher stage, such as a substitution or transposition step which will be shown in the next slide. As a simple example, we will add a secret key number, such as, 83729, using non-carrying addition: Step 3 Then use the same straddling checkerboard to turn it back into letters: The final cipher text is then CMUDMECCMYMDPUFCCDOPEEPHYEPPFMYMDPPDPPCMY. Note that it is a different length compared to the original plain text. Deciphering is simply the reverse of this process. Although the size of groups can vary, deciphering is unambiguous because whenever the next element to be deciphered starts with a 3 or a 7, it is a pair; otherwise, it is a single letter. Step 4 Definitions just in case... Definitions (Just in case) Cipher- a secret or disguised way of writing a code. Encrypt- convert info or data into a cipher or code, especially to prevent unauthorized access. Decrypt- make a coded or unclear message intelligible. Key- clues/sequence used to encrypt/decrypt a message or code.

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Transcript: Nobody knows babies like we do! Quality products . Good Customer service. Every Kid really loves this store.. BABYLOU ABOUT US About Us BabyLou was established in 2004. It has been more than a decade since we started, where we have ensured to take care of every need and want of every child and infant under one roof, true to the caption “NO BODY KNOWS BABIES LIKE WE DO”. Our benchmark is to provide 100% customer service and satisfaction and continue to deliver the same with a wide range of toys, garments and Baby Products. Play and Create We Are Best 01 02 03 Block games Building Blocks help Kids to use their brain. PLAY TO LEARN in Crusing Adventures Our Discoveries Enjoy a sunny vacation aboard a luxury yacht with the LEGO® Creator 3in1 31083 Cruising Adventures set. This ship has all the comforts you need, including a well-equipped cabin and a toilet. Sail away to a sunny bay and take the cool water scooter to the beach. Build a sandcastle, enjoy a picnic, go surfing or check out the cute sea creatures before you head back to the yacht for a spot of fishing. Escape into the mountains Disney Little Princes in Also available for your Babies..... Also... Out of The World… Our reponsibility BABYLOU…. Our Responsibility All children have the right to fun, creative and engaging play experiences. Play is essential because when children play, they learn. As a provider of play experiences, we must ensure that our behaviour and actions are responsible towards all children and towards our stakeholders, society and the environment. We are committed to continue earning the trust our stakeholders place in us, and we are always inspired by children to be the best we can be. Innovate for children We aim to inspire children through our unique playful learning experiences and to play an active role in making a global difference on product safety while being dedicated promoters of responsibility towards children.


Transcript: Checkerboard Proposal Seth, Joe, Ben, Tommy The Portable Checkerboard The Board Purpose and Performance 5000 year old game with unique, modern style and portability Comfortably fits in pocket or bag with lightweight, compact form Fold-out design that sets up in seconds Challenge your friends anywhere, anytime Ergonomic playing pieces Durable design to withstand especially heated games About the Board A Quality Board will... Quality Withstain impacts without breaking (such as falling from a table?) ABS (the plastic lego is made of) has an impact strength of 7.7 in-lbs per in. Close with both sides flush Hold itself shut firmly with magnets Open easily and lay flat on a table Prevent pieces from moving after being placed on the board Improving on a Classic Clumsy to transport Compact fold-up design Usually heavy wood or flimsy cardboard Strong, Lightweight build Unchanged visuals Attractive modern look Why this Board Problem: Solution: Part Cost Breakdown Budget Delrin Boards- Magnets- Lego Hinges- Pieces- $18.64 $0.29 $0.42 $0.65 ($0.027 per piece) Total = $20.00 The Process The Process Board Infeed Vertical magazine feeder w/ pneumatic pusher Modification of last year's system requires minimal new parts Infeed Old New Pallet Fixture Pallet Pallet loaded with raw stock by gantry using suction cup (unmodified) Uses HDPE material in 4"x6.5"x2" block Loading Mill Part is moved from pallet fixture to vice jaws in mill with suction cup EOAT on robot After the top is milled, the part will be removed and flipped using flipping fixture (relocate dowels on existing fixture) before being placed in jaws again Part is then removed from mill and placed back on pallet fixture Loading Mill Flipping Fixture Suction cup EOAT Machining Machining Assembly Board Assembly Magnetic Latch Latch Assembly Current State Flipping Table Infeed Machining EOAT Assembly Station Vice Jaws Assembly EOAT Line Modification Cost Breakdown Budget Board Infeed - Pallet Fixture - Loading Mill - Machining - Assembly - Unload - Injection Molding - $57 $73 $2 $23 $308 $423 $100 Total = $984 Skills CAD/CAM Sensor Application Motor Wiring PLC Programming Quality Assurance Metal Fabrication 3D Printing Injection Molding Pneumatic Systems Skills

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Transcript: What should we do? Body development Summary Reactions of people involved Recommendations Employees Employers Introducing the idea of principlism Improve quality of life Improving Preventative Healthcare Improve physical well-being Improving Healthy living in the Workplace What if we take a more direct approach? employing activities volunteers and/or occupational therapists Improving the education system Reactions of the people involved Benefits of healthy diet Overall recommendation Recommendations Effects of taking a direct approach Green prescription initiative Thank you! Balanced diet and physical activity Improve social situation provide cultural competency training cultural festivities Physical well-being Quality of life vs prolonging life Ethnic equality ----> social equality Social support Immune system Government School Parents Education system 1) Balanced diet and physical activity 2) Effect of education system 3) Key role of parents Ethical Implications Healthy living in Schools Active lifestyles at the workplace Support for the elderly skeletal condition Recommendations Improve ethnic equality Improving social well-being in elderly health care Recommendation Improving healthy eating and active living in schools Summary Recommendations Preventative Healthcare in New Zealand Physical well-being already gets significant attention Education parents Green initiative Cultural diversity, Quality of life Educating staff on social well-being Hiring palliative care physicians Hiring psychologist and social workers A programme based on the green prescription initiative Government actions Direct approach - Principlism Reactions of people involved Medical staff Elderly patients and relatives Government Recommendations more directive approach in: educating school children on healthy eating/active living improving active lifestyle in the workplace improving social well-being in the elderly healthcare by using principlism and taking into account people's autonomy Influence of school

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