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https://rot47.net/ ROT47 Encode/Decode, ROT47 Character Substitution Cipher with API This page provides a Javascript online web-based ROT47 Encoder/Decoder. The ROT47 (Caesar cipher by 47 chars) is a simple character substitution cipher that... substitution cipher encode decode character api https://en.wikibooks.org/wiki/Cryptography/Substitution_cipher Cryptography/Substitution cipher - Wikibooks, open books for an open world substitution cipher open books cryptography wikibooks world