換字式暗号

かえじしきあんごう

noun

•

substitution cipher

換	interchange, period, change, convert, replace, renew
字	character, letter, word, section of village
式	style, ceremony, rite, function, method, system, form, expression
暗	darkness, disappear, shade, informal, grow dark, be blinded
号	nickname, number, item, title, pseudonym, name, call