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Encryption for online banking is based on which kind of number?
APaired
BPartial
CPerfect
DPrime
Answer & Solution
Correct answer: D. Prime
1. A composite is built from two very large ones.
2. Breaking the code means finding them again.
3. The basis is prime numbers.
_Source: OpenStax, Contemporary Mathematics, Ch 3 'Real Number Systems and Number Theory'_
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