Pseudo-random != Random

• For a pseudo-random number generator (PRNG)

  • The real key is finite length
  • It is used to generate longer sequences
  • English encrypted with pseudo-random numbers is breakable in 2.6 times the PRNG key length

• It may SEEM like a one-time-pad

• But it is not!!!

• Question: How do we get real random numbers?

• Question: How do we use them?

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