One Means of Forming a MAC Is to Combine a Cryptographic

question 1

True/False

One means of forming a MAC is to combine a cryptographic hash
function in some fashion with a secret key.

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Definitions:

Crossover Rate

The rate at which two projects have the same net present value, used in capital budgeting to compare the attractiveness of different projects.

Mutually Exclusive

Mutually exclusive projects or events are those that cannot occur simultaneously; choosing one option means the other cannot be selected.

NPV

Net Present Value, a method used in capital budgeting to assess the profitability of an investment or project.

Payback

Payback is the period of time required for the return on an investment to "pay back" the sum of the original investment, often used as a measure of investment risk.