Distribution ensemble

In cryptography, a distribution ensemble or probability ensemble is a family of distributions or random variables

is a (countable) index set, and each

is a random variable, or probability distribution.

have a certain property for n sufficiently large.

is uniformly distributed over strings of length n. In fact, many applications of probability ensembles implicitly assume that the probability spaces for the random variables all coincide in this way, so every probability ensemble is also a stochastic process.

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