to the passage below and then answer the question afterwards in the same language as the passage: Passage: Linear cryptanalysis was discovered by Mitsuru Matsui, and needs 243 known plaintexts (Matsui, 1993); the method was implemented (Matsui, 1994), and was the first experimental cryptanalysis of DES to be reported. Kò sí ẹ̀rí wípé DES ni a ṣe àdàkọ láti dènà irú ìkọlù yìí. A ṣe àbá fún àpapọ̀ LC<unk>multiple linear cryptanalysis<unk> ni 1994 (Kaliski and Robshaw), tí Biryukov and others tún ṣe. (2004); àyẹ̀wò wọn fi hàn wípé a lè lo àwọn àpapọ̀ ìsọ̀sókè ìsọ̀sókè láti dín àwọn ìsọ̀sókè ìsọ̀sókè ìkọlù náà kù ní ìwọ̀n ìgbà mẹ́rin (ìyẹn 241 dípò 243). Ìsọ̀sókè ìsọ̀sókè ìsọ̀sókè ìsọ̀sókè lè di èyí tí a yàn nínú àdàkọ̀
kò sí ẹ̀rí