此类信息邀请用户下载新的密码，并通过其附带的软件为黑客留下远程登录的后门。

The message invites users to download a new password, but carries a piece of software that could allow their machine to be invaded by hackers.

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恶意软件正与日俱增(间图二)，其典型用途是偷盗密码和其他数据，或者打开电脑的“后门[注4]”以便入侵者控制。

Malware is exploding (see chart 2). It is typically used to steal passwords and other data, or to open a "back door" to a computer so that it can be taken over by outsiders.

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这些“后门”本是用销售公司的技术人员为了更新运行软件而留下的密码。

These are passwords used by technicians from firms that sell the devices to update the software that runs them.

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