Simplify the following text for a Grade 11 native English-speaking person.
Original: In some cases keys are randomly generated using a random number generator ( RNG ) or pseudorandom number generator ( PRNG ) , the latter being a computer algorithm that produces data which appears random under analysis .
Simplified: In some cases keys are randomly generated using a random number generator ( RNG ) or pseudorandom number generator ( PRNG ) . A PRNG is a computer algorithm that produces data that appears random under analysis .