Five Important Attack in Round Function Using SIMECK Algorithm

Block cipher-based hash function is a hash function that is constructed by applying a block cipher algorithm on a scheme to form a hash algorithm. So that the strength of the block cipher-based hash function depends on the strength of a block cipher algorithm which is used. In this research, fixed point attack is done to determine the application of SIMECK lightweight block cipher scheme PGV-5 hash function in accordance with the characteristics of the five important attack. SIMECK is a new lightweight block cipher design based on the combination of SIMON and SPECK block cipher. While the design allows a smaller and more efficient hardware implementation, its security margins are not well understood. Five important attack is applied to generate all possible 2^32 plaintext with 3 random IV. The result of this research, block cipher-based hash function with PGV-5 scheme using SIMECK algorithm, is not resistant against five important attack where the probabilities to obtain collision is 0.00000000139 in the three IV random samples which are used