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* 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.
* 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.
To find the state of this project's repository at the time of any of these versions, check out the tags.