大多数数据加密方法需要对在什么地方与什么时候对数据进行加密作出明确的决策、手动装入和卸载加密的映像，并输入相应的密码。
Most data encryption methods require explicit decisions of where and when to encrypt data, manual mounting and unmounting of encrypted images, and entering passwords.
大多数数据加密方法需要对在什么地方与什么时候对数据进行加密作出明确的决策、手动装入和卸载加密的映像，并输入相应的密码。
Most data encryption methods require explicit decisions of where and when to encrypt data, manual mounting and unmounting of encrypted images, and entering passwords.
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