base64Y3liZXJwZWFjZXtXZWxjb21lX3RvX25ld19Xb3JsZCF9题目就告诉我们了：base64cyberpeace{Welcome_to_new_World!}Caesar凯撒：oknqdbqmoq{kag_tmhq_xqmdzqp_omqemd_qzodkbfuaz}cyberpeace{you_have_learned_caesar_encryption}Morse题目：111110100000101011110