外部媒体选项后您选择和验证的所有文件传输，请单击下一步按钮上，您可以选择密码保护该文件。
For the External media option, after you've chosen and verified all of the files to be transferred, click on the Next button where you can choose to password protect the file.
为此，须要研讨和剖析现有密码算法，并从中选择较适合的密码算法用于实际的信息传输应用体系。
Therefore, it is necessary to study and analyze some cryptogrammic arithmetics and select appropriate ones to apply in the practical information system.
为此，须要研讨和剖析现有密码算法，并从中选择较适合的密码算法用于实际的信息传输应用体系。
Therefore, it is necessary to study and analyze some cryptogrammic arithmetics and select appropriate ones to apply in the practical information system.
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