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So the question is: suppose that Alice forgets the value that she used for the initialization vector--she encrypted some file, she has the ciphertext and she has the key. Can she still recover n, even though she forgot the IV? --the Initial Value-- So the answers are: amp;quot;No,amp;quot; she canamp;#39;t recover any of them; amp;quot;Almost,amp;quot; that she can recover all of them except for the very first block; amp;quot;Almost,amp;quot; that she can recover all of them except for the first and the second block; or that she can only recover the very last block of n.