1.caeser
flag{historical_cipher_is_vulnerable}
2.吉奥万·巴蒂斯塔·贝拉索先生的密码
flag{bruteforce_is_useful_for_breaking_cipher}
3.eazyxor
flag{x0r_i5_qu1t3_3azy}
4.RSA_begin
flag{W0w_U_ar3_re4L1y_g0Od_4t_m4th_4nD_RSA!!}
5.chaos
解法1
flag{ii24nji9-8ckkpil1-5hiev3n6-1u24g07m}
解法2