Pseudorandom number generator for which it is impossible to deduce the seed I'm looking for an RNG that in the case that an attacker would get all or part (most likely part) of the pseudorandom data, there will be no way for them to deduce the original seed more efficiently than brute force.

Which RNG's would comply with my requirements?
Random number generation is the generation of a sequence of numbers or
  symbols that cannot be reasonably predicted better than by a random
  chance... Source: Wikipedia


It follows that "an attacker [with] all or part" of the sequence cannot "predict any non-given [part of the sequence] better than guessing," as hinted in a comment, so guessing is the best an adversary can do.



The original question mentions pseudorandom data and an original seed, without relation to RNGs, so perhaps the question is missing something and I'm answering the wrong question.