But music and movie pirates can get around this by Posting the lists of available songs or films, along with the passwords, on outside message boards.

不过，音乐和电影的盗版者可以通过在外部的留言板上张贴可下载的附带密码的歌曲和电影的列表来规避这种限制。

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Complex but publicly available encryption could also be used, but using this technology could draw attention - rendering regular message boards and groups a safer way of operating.

BBC: NEWS | In Depth | A web wise terror network