Ciphers

Morse code

Letters and digits to dots and dashes. A space between letters, a slash between words.

create: create("morse")
family: Fractionation
options: none
self-inverse: no
keyspace: 1 (fixed table)
try it: ciphers morse "SOS"

International Morse. Each letter or digit becomes dots and dashes, letters separated by one space, words by /. Common punctuation has a code too. A character without one passes through as it is.

const morse = create("morse");
morse.encode("SOS").text; // "... --- ..."
morse.encode("SOS HELP").text; // "... --- ... / .... . .-.. .--."
morse.encode("A, B?").text; // ".- --..-- / -... ..--.."
morse.decode("... --- ... / .... . .-.. .--.").text; // "SOS HELP"

Decoding doesn't care about extra spaces around the slash. Output is uppercase, Morse has no case.

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Polybius square

Each letter becomes a row digit and a column digit in a 5×5 grid, I and J sharing a cell. An optional keyword reorders the grid.

Bacon's cipher

Five A or B per letter, the 26-letter variant, no separators. Made to hide in another text's typography.