Consider the following mutual authentication protocol using Symmetric Key Crypto. The symmetric key K is only known to Alice and Bob. Messages exchanged over the network can be observed. E is a symmetric encryption algorithm. Rais a nonce. Alice -> Bob: "I'm Alice", RA Bob -> Alice: E(RAK) Alice -> Bob: E(RA+1, K) Which of the following descriptions is correct about this protocol? This protocol is subject to reflection attacks. This protocol is secure. This protocol is subject to replay attacks. This protocol is subject to both reflection attacks and replay attacks.