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LC4 & LS47 cipher printable tiles sheet (PDF & PNG)

posted May 15, 2018, 7:23 AM by Sami Lehtinen   [ updated May 20, 2018, 12:34 AM ]
LC4 is another pen-and-paper symmetric cipher, using mutable s-box appliance tiles for cipher state and encryption key. LS47 is basically same, but with extended character set and different marker mode. Yet these can be applied as required.

LC4 tileset PNG

LS47 tileset PNG

Why? I did a quick search and didn't find anything else than 3D printable STL version. Duh, but I don't need that. Here's simple version which you can print with any printer, and then attach the tiles to your favorite background. What ever it is. Heavy plastic, cardboard, wood / lego blocks or so.

The set doesn't include the marker object / block / tile, because that's something you'll need to physically have. You can use any small suitable object.

The EFAIL attack / vulnerability, is perfect example why encryption on computer (and handling the plaintext) is potentially dangerous.

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