The iv object now wraps the key as well as the initial vector, so I will pass this object whenever I need to specify the key and the initial vector.
iv对象现在包装了密钥以及初始矢量，所以我在需要指定密钥和初始矢量时传递这个对象。
The iv object now wraps the key as well as the initial vector, so I will pass this object whenever I need to specify the key and the initial vector.
iv对象现在包装了密钥以及初始矢量，所以我在需要指定密钥和初始矢量时传递这个对象。
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