Take the 2-minute tour ×
Cryptography Stack Exchange is a question and answer site for software developers, mathematicians and others interested in cryptography. It's 100% free, no registration required.

What is the difference between Pseudo Random Functions and Random Oracles?

  1. Is the difference only about the domain of PRFs and Random Oracles, former having a fixed domain and latter can act on any input as long as it is well formatted?
  2. Having a Random Oracle is a stronger assumption, why is that?
share|improve this question
    
Take a look at this for an intuitive definition of the random oracle –  rath Apr 4 at 0:34

1 Answer 1

  1. $\;\;\;$ No. $\:$ A PRF involves a secret key; a Random Oracle doesn't.

  2. $\;\;\;$ One can construct a PRF from a random oracle.

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.