安全的威胁可分为两大类,即主动攻击和被动攻击。通过截取以前的合法记录稍后重新加入一个连接,叫做重放攻击。为防止这种情况,可以采用的办法是 (1) 。一个计算机系统被认为是可信任的,主要从其受保护的程度而盲的,Windows NT 4.0以上版本目前具有的安全等级是 (2) 。
SSL协议是运行在 (3) 层的协议,而IPSec协议是运行在 (4) 层的协议。
CA证书格式要遵循 (5) 标准。
Euthanasia can be either active or passive: (46) Active euthanasia means that a physician or other medical personnel take a deliberate action that will induce death, such as administering an overdose of morphine, insulin , or barbiturates, followed by an injection of curare. Passive euthanasia means letting a patient die for lack of treatment, or suspending treatment that has begun. Examples of passive euthanasia include taking patient off a respirator (a breathing apparatus) or removing other life -support systems. Stopping the food supply--usually intravenous feeding to comatose patients--has also been used.
A good deal of the controversy about mercy killing stems from the decision - making process. Who decides if a patient is to die This issue has not been established legally. (47) In the United States the matter is left to state law, which usually allows the physician in charge to suggest the option of death to a patient’ s relatives, especially if the
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