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The cipher works by transforming letters in the following way:
This substitution cipher divides the alphabet into two distinct groups—letters A–F and letters G–Z—and then reverses the order of the letters within each group. In the first group, the transformation maps A to F, B to E, C to D, D to C, E to B, and F to A. The second group follows a similar logic: G becomes Z, H becomes Y, I becomes X (hence, NXTRS), continuing this pattern until Z is mapped to G. This method creates a mirror effect for each section of the alphabet. The cipher preserves the case of the original letters, so uppercase and lowercase letters are both translated into their respective reversed versions, while any non-alphabet characters remain unchanged.
Unlike a traditional Caesar cipher—which uniformly shifts each character by a fixed number of positions—this cipher’s unique approach of splitting the alphabet into two segments makes it cooler. By handling the two segments separately, the cipher obscures the message and introduces an unexpected twist that can make decryption challenging without the proper key.