1. Figure 2.10 shows ciphertext coset signatures for various numbers of cosets. What is the likely keyword length? Explain. assumed keywoed length 2 0 12 0.14 0.12 008 008 002 0 02 15 25 ssmed Keyword length 3 asuned krywond length 4 0.12 0.15 0.125 0073 0025 13 anuned keyword Imt6 0175 0.15 0125 0.13 412s 0 I a.1 0 075 0.005 I0 15 Figure 2.10 Figures for Exercise 1