Biclique cryptanalysis of MIBS-80 and PRESENT-80 block ciphers

In this paper we present the first biclique cryptanalysis of MIBS block cipher and a new biclique cryptanalysis of PRESENT block cipher. These attacks are performed on full-round MIBS-80 and full-round PRESENT-80. Attack on MIBS80 uses matching without matrix method and has a data complexity upper bounded by 252 chosen plaintext where it reduced security of this cipher about 1 bit. Attack on PRESENT-80 has a data complexity of at most 222 chosen plaintexts and computational complexity of 279.37 encryptions that both complexities are lower than other cryptanalyses of PRESENT-80 so far.