密码学 mìmǎxué cryptography Origin Definitions Defs Strokes Stroke Words Sentences Sents 密码 密碼 mìmǎ cipher a system of secret symbols used for secure telecommunications or documents, such as a secret code学 學 xué nounaffix branch of learning (bound form) a subject or branch of study; often used as a suffix for -logy, -ics, or -science