/**
 * A javascript implementation of a cryptographically-secure
 * Pseudo Random Number Generator (PRNG). The Fortuna algorithm is followed
 * here though the use of SHA-256 is not enforced; when generating an
 * a PRNG context, the hashing algorithm and block cipher used for
 * the generator are specified via a plugin.
 *
 * @author Dave Longley
 *
 * Copyright (c) 2010-2014 Digital Bazaar, Inc.
 */
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