In
cryptography
Cryptography, or cryptology (from grc, , translit=kryptós "hidden, secret"; and ''graphein'', "to write", or ''-logia'', "study", respectively), is the practice and study of techniques for secure communication in the presence of adver ...
, MMB (Modular Multiplication-based Block cipher) is a
block cipher
In cryptography, a block cipher is a deterministic algorithm operating on fixed-length groups of bits, called ''blocks''. Block ciphers are specified cryptographic primitive, elementary components in the design of many cryptographic protocols and ...
designed by
Joan Daemen as an improved replacement for the
IDEA
In common usage and in philosophy, ideas are the results of thought. Also in philosophy, ideas can also be mental representational images of some object. Many philosophers have considered ideas to be a fundamental ontological category of being ...
cipher.
multiplication
Multiplication (often denoted by the cross symbol , by the mid-line dot operator , by juxtaposition, or, on computers, by an asterisk ) is one of the four elementary mathematical operations of arithmetic, with the other ones being additi ...
is the central element in the design. Weaknesses in the
key schedule
In cryptography, the so-called product ciphers are a certain kind of cipher, where the (de-)ciphering of data is typically done as an iteration of ''rounds''. The setup for each round is generally the same, except for round-specific fixed valu ...
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
In cryptography, 3-Way is a block cipher designed in 1994 by Joan Daemen. It is closely related to BaseKing; the two are variants of the same general cipher technique.
3-Way has a block size of 96 bits, notably not a power of two such as the ...
.
MMB has a
key size and
block size of 128 bits.
References
*
External links
Paulo Barreto's comments on MMBDaemen's PhD thesis(The specification of MMB appears in section 11.5)
Broken block ciphers
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