Forward security of the scheme means that even if the secret key of currenttimeperiod is compromised, some security remains. It is impossible to forge the signature relating to the past.
It allows administrators to monitor current query activity or activity during a specific timeperiod, such as queries that were processed today, this week, or during the past month.
它允许管理员监控当前查询活动或者某一特定时期的活动，例如今天、本周或上月处理的查询。
3
Although he reiterated the threat that Libya could face a prolonged period of civil war if the current unrest didn't come to an end, many would wonder if there was a slight change of tone this time.