Sign up ×
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 ideal system for an encryption scheme? For a pseudorandom permutation the ideal one is a random permutation, for a pseudorandom function the ideal one is a random function. For an encryption scheme do we have a well known application describing an ideal system for an encryption? Maybe the one-time pad?

share|improve this question
An OTP is a good example. Take a look at this answer, particularly the definition it contains – rath Jul 5 '13 at 14:26
possible duplicate of definition and meaning of semantic security – rath Jul 5 '13 at 14:28
If you are concerned about idealization of crypto protocols (of which encryption is a special case), you could look up references about the Universal Composability framework (UC framework). – minar Jul 6 '13 at 8:16
Thank you user7423, which references I should look ? – Dingo13 Jul 6 '13 at 8:29
You could start with Canetti's paper: – minar Jul 7 '13 at 5:47

Your Answer


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

Browse other questions tagged or ask your own question.