Different Method of Defense

Harm occurs when a threat is realized against vulnerability. To protect against harm then we can neutralize the threat, close the vulnerability or both. The possibility for harm to occur is called risk. We can deal with harm in several ways. We can seek to-

• prevent it, by blocking the attack or closing the vulnerability
• deter it, by making the attack harder but impossible
• deflect it, by making another target more attractive
• detect it, either as it happens or some time after the fact
• recover from its effects

of course, more then one of these can be done at once. So, for example we might try to prevent intrusions. But in case we do not prevent them all. We might install a detection device to warm of an imminent attack. And we should have in place incident response procedures to help in the recovery in case an intrusion does succeed.