I don’t think that this actually counts as a cipher, but it might be that it doesn’t count as a code. Possibly both. You decide.
I use this as a very quick way to disguise words. Don’t ask why or what sort. It is very easy to write and read on the fly. I just want to see if you need to know how it works to figure it out. I came up with it myself, but it isn’t at all original. Try it.
TSLIL ENDE OT EDISED HWTA OT RWTIE. OSEMHTNIG BAUOT ABSSTES? KO ABSSTES RAE HTE EBTS VERE. FI OYU ODT’N ILEK HTME, OYU RAE EMTNLAYL NUTSBAEL.
ACN HTSI EMHTDO EB OCSNDIREDE A OCED RO HCPIEHR? LPAEES ETLL EM. SAOL ASY HTAT OYU IFUGERD HTSI UTO, HWCIH UYO RPBOBAYL IDD FI UYO ERDA HTTA NUELSS UYO OGT OSEMNOE LEES OT. I NKWO HTREE HSUODL AHEV EBEN A OCMMA HTREE, UBT HTNE D’I AHEV A OCMMA PSILEC NAD FI YM NELGSIH ETHAECR ASW… EWLL, TI’S ONT HTAT I EGT YM AMKRS RFMO TSDUIYGN. NOYL OJIKGN. HSE IWLL ENEVR ESE NAD RCCAK HTSI.
FI HTREE RAE NAY MITSKAEES, LPAEES ELT EM NKWO. TI OWLUD EB OSOO MEBRAASSGIN.
I intentionally used common words and letter combinations, mostly… in this case that does not always help. The punctuation might. ,’;!