Users may select encryption without specifying authentication, but this action leaves the packets vulnerable to active attacks, which can lead to an outside entity breaking the encryption.

用户可以选择不用特定的认证进行加密，但是这样会让包容易受到攻击，导致让别人破坏加密。

youdao

Availability is assured at the operating system level, allowing for transparent mitigation of active and passive network denial-of-service attacks.

它在操作系统级确保可用性，可以透明地缓解主动和被动网络拒绝服务攻击。

youdao

Active from May to late June, when it claims to have disbanded, LulzSec's hallmark was prankish attacks accompanied by public mockery.

一直从五月活跃到七月末，它忽然宣布解散。LulzSec特点就是在公众的嘲笑下恶作剧般的攻击。

youdao

On Wednesday, Microsoft released a security advisory warning users of active attacks using a previously unknown bug in Internet Explorer (IE) that affects users of versions six, seven of the browser.

FORBES: Criminal Exploits Targeting New Bug In Old Internet Explorer Versions

These claims are accompanied by the statistics from one area or another and of course a significant drop in heart attacks just as the smoking ban becomes active in that area.

FORBES: Smoking Bans Do Not Reduce Heart Attacks

That's what Kelleher--who, as chairman, still plays an active role--wanted to know soon after the attacks.

FORBES: Is There Such a Thing as Nonstop Growth?