* Integrated GNU-Crypto's Fortuna PRNG, seeding it off /dev/urandom and
      ./prngseed.rnd (if they exist), and reseeding it with data out of
      various crypto operations (unused bits in a DH exchange, intermediary
      bits in a DSA signature generation, extra bits in an ElGamal decrypt).
      The Fortuna implementation under gnu.crypto.prng has been modified to
      use BouncyCastle's SHA256 and Cryptix's AES (since those are the ones
      I2P uses), and the resulting gnu.crypto.prng.* are therefor available
      under GPL+Classpath's linking exception (~= LGPL).  I2P's SecureRandom
      wrapper around it is, of course, public domain.