Shift Cipher Encoder/Decoder Ring

prusaprinters

<p>This ring is a simple tool to encode or decode text using a simple shift cipher, also called Caesar cipher. See this <a href="https://en.wikipedia.org/wiki/Caesar_cipher">Wikipedia article </a>for details. It has an additional ring with the letter numbers.</p><p>The middle ring can be freely rotated, so you can set the number of shifted positions easily.</p><p>It is a nice toy for kids, to teach them cryptology basics.&nbsp;</p><h3>Printing the Ring</h3><p>There are three separate prints, each with two colours. I recommend the following materials and colours for the print:</p><p><strong>LR2146-101 Ring A (Outer Ring)</strong></p><ul><li>Colour 1: Prusament PLA Mystic Brown or Prusament PLA Galaxy Black</li><li>Colour 2: Prusament PLA Oh My Gold or Prusament PLA Viva La Bronze</li></ul><p><strong>LR2146-102 Ring B (Middle Ring)</strong></p><ul><li>Colour 1: Prusament PLA Mystic Brown or Prusament PLA Galaxy Black</li><li>Colour 2: Prusament PLA Lime Green or Prusament Oh My Gold</li></ul><p><strong>LR2146-103 Middle (Center with Numbers)</strong></p><ul><li>Colour 1: Prusament PLA Mystic Brown or Prusament PLA Galaxy Black</li><li>Colour 2: Prusament PLA Lime Green or Prusament PLA Prusa Orange</li></ul><p>No supports are needed for the print, you find <i>3mf</i> files, where you can see the correct orientation and settings for each print.</p><h3>Assembly</h3><p>Put the middle ring (102) on top of the outer ring (101) and make sure it rotates freely. Then carefully insert the centre (103). It will snap into place.</p><p>Make sure you orient the numbers of the centre, to match the 1 with the A on the outer ring.</p><p>Either keep the snap-fit, where you can rotate the centre ring with the numbers. Or put a drop of glue in the gap to prevent further rotation of this ring.</p><p>Fusion360 sources are available for my Patreons.</p>