Exam 312-50 topic 5 question 4 discussion

In chosen cyphertext attack Attacker has many samples of encrypted text acquired from sniffing and is able to decrypt arbitarary sample of text. This is chosen cypher text attack beacuse attacker can choose arbitary encrypted text and decrypt it. Observing output and comparing this to input samples he can deduct the encryption key. Chosen-plaintext attack is an opposite attack to chosen-cypher text attack. in Chosen-cypher text attack attacker chooses samples of plaintext, encrypt it and compares output with inputs to deduct encryption key. Question in exam is a bit stupid. Normally doing sniffing is rather unlikely that attacker can decrypt payload and still be looking for encryption key that is often specyfic to session.