-PSPP uses the alleged RC4 cipher as a pseudo-random number generator
-(PRNG). The bytes output by this PRNG are system-independent for a
-given random seed, but differences in endianness and floating-point
-formats will make PRNG results differ from system to system. RC4
-should produce high-quality random numbers for simulation purposes.
-(If you're concerned about the quality of the random number generator,
-well, you're using a statistical processing package---analyze it!)
-
-PSPP's implementation of RC4 has not undergone any security auditing.
-Furthermore, various precautions that would be necessary for secure
-operation, such as secure seeding and discarding the first several
-bytes of output, have not been taken. Therefore, PSPP's
-implementation of RC4 should not be used for security purposes.
+PSPP uses the ``Mersenne Twister'' PRNG as implemented in the GNU
+Scientific Library, specifically the @code{gsl_rng_mt19937} variant.
+This PRNG is a variant of the twisted generalized feedback
+shift-register algorithm The bytes output by this PRNG are
+system-independent for a given random seed, but differences in
+endianness and floating-point formats will make PRNG results differ
+from system to system.