multiplesubstitutioncipher
nounUK /ˈmʌltɪpəl ˌsʌbstɪˈtjuːʃən ˈsaɪfə/
US /ˈmʌltəpəl ˌsʌbstəˈtuːʃən ˈsaɪfər/
A secret code that swaps each letter for a different letter in more than one way.
The spy used a multiplesubstitutioncipher so that the same letter could turn into different symbols each time.
RELATED WORDS
OTHER MEANINGS
2. A cipher system that uses several substitution alphabets in rotation to hide letter patterns.
Breaking the multiplesubstitutioncipher required finding how often the alphabets shifted.
3. Any encryption method where a single character can map to multiple possible replacements.
Modern students study the multiplesubstitutioncipher to understand why simple codes fail.
4. A teaching example in cryptography showing how repeating keys strengthen secrecy.
The teacher wrote a multiplesubstitutioncipher on the board with three shifting rows.