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A(n) ___________is a way to authenticate online messages,analogous to a physical signature on a piece of paper,but implemented with public-key cryptography.
Opportunity Cost
The worth of the best alternative given up due to making a decision.
Opportunity Cost
The value of the next best alternative that is foregone when making a choice.
Tuition
The fee that educational institutions charge for instruction and training.
Work Hours
The period of time during which an individual is actively engaged in work tasks.
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