Suppose we use the following letters of the alphabet below and the encoding shown next to each to create a cipher: a: 0, b: 1, ..., z=25. What kind of attack can be launched to decrypt a ciphertext created by using a key with the same alphabet? Assume that the attacker can only see the ciphertext.

	1.	Chosen plain text attack
	2.	Frequency analysis
	3.	Brute force attack
	4.	Chosen cipher text attack