I have noticed a slight change in the standard documentation of FIPS-202 and ISO/IEC 10118-3 documents for algorithm 5:rc(t) as below: ISO/IEC 10118-3 Algorithm 5: rc(t) Input: integer t Output: bit rc(t) Steps: a)If t mod 255 = 0, return 1. c)For i from 1 to t mod 255, let: b) Let R = 10 000 000...

Is semantic security equivalent to IND-CPA? If a PKE scheme like ElGamal is semantically secure, can we say it is IND-CPA? What's the relationship between semantic security and IND-CPA?

I'm currently working on a proof in the random oracle model, where a single random oracle is used in multiple places. Each use is domain-separated so I was thinking of representing it as multiple random oracles for simplicity. Is this valid for the proof? I can't see why it wouldn't be but I can...