头包括一些关于消息的元数据,它可以是一个事务 ID 或者加密密钥。
The header can contain some metadata about the message, which could be a transaction ID or encryption keys.
但是,/etc/security 目录包含的文件处理密码复杂性(user)、限制(limits)、加密的密码(passwd)和组元数据(groups)。
But, the /etc/security directory contains files that handle password complexity (user), ulimits (limits), encrypted passwords (passwd), and group metadata (groups).
在将数据上传到云之前,Alice会使用数据处理器将文档与其元数据(标签、时间、大小等等)一起加密和编码,然后她会将其传送到云上。
Before uploading data to the cloud, Alice USES the data processor to encrypt and encode the documents along with their metadata (tags, time, size, etc.), then she sends them into the cloud.
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