Someone script kiddie just invented a new encryption scheme. It is described as a blend of modern and ancient cryptographic techniques. Can you prove that the encryption scheme is insecure by decoding the ciphertext below?

Ciphertext: OoDVP4LtFm7lKnHk+JDrJo2jNZDROl/1HH77H5Xv
得到的flag使用NSSCTF{}格式提交。