… and no, since neither the enciphering nor the deciphering do a 1:1 mapping for... | Hacker News

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		JdeBP 83 days ago \| parent \| context \| favorite \| on: Scream cipher … and no, since neither the enciphering nor the deciphering do a 1:1 mapping for all possible input code points.

amenhotep 83 days ago [–]

That's not a requirement. Pigpen is a substitution cipher.

JdeBP 82 days ago | [–]

You will find that the pigpen cipher has a 1:1 mapping between its input alphabet and its output alphabet, and that a 1:1 mapping is a necessity for full invertibility.

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