MMB (cipher)

In cryptography, MMB (Modular Multiplication-based Block cipher) is a block cipher designed by Joan Daemen as an improved replacement for the IDEA cipher.^[3] Modular multiplication is the central element in the design. Weaknesses in the key schedule were identified by Eli Biham, and this, together with the cipher's not having been designed to resist linear cryptanalysis, meant that other designs were pursued instead, such as 3-Way.

MMB

General
Designers	Joan Daemen
First published	1993
Derived from	IDEA
Successors	ABC
Cipher detail
Key sizes	128 bits
Block sizes	128 bits
Structure	Substitution–permutation network[1]
Rounds	6
Best public cryptanalysis
Key recovery using 267 chosen plaintexts[2]

MMB has a key size and block size of 128 bits.