Just like traditional criminals, computer criminals have a reason for doing the bad things that they do. There are three terms that help better put criminal activity into perspective.
Motive-why the person is committing the crime. It could be for monetary gain, or simply because they get a rush by seeing if they can get away with it.
Opportunity-Where and when the crime happens. If a criminal sees that a companies firewall is down at a certain time, this is their time to attack.
Means-Does the criminal have what it takes to commit the crime they want to? This could include intellect and the hardware necessary to commit the crime.
Types of Evidence:
Best- primary; provides the most reliability
Secondary- unreliable evidence
Direct- fact proving evidence
Conclusive- cannot be contradicted
Circumstantial- proves intermediate facts
Corroborative- supporting that helps prove something else
Opinion- opinion rule; can only testify to the facts
Hearsay- written or oral; no firsthand proof
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