Explain why the following paradigm does not give a secure authenticated encryption, i. e. an encryption scheme that satisfies both ind-cpa security and ciphertext integrity (adversary cannot make new ciphertext without knowing the key or asking the encryption oracle). the paradigm encryption algorithm first runs an enc algorithm on message m to obtain c, and then runs a tag algorithm on message m and obtains σ, the final ciphertext will be (c, σ).