For a little more entropy you can add the seconds from time to the process PID (UUID). That will give you a difference each run at the seconds numeric scale that would tend to repeat at the PID cycle rate. You could add in microseconds from http://www.boost.org/doc/libs/1_51_0/doc/html/date_time/posix_time.html (Linux gettimeofday) for additional entropy. On Linux with some additional work you can use /dev/random and /dev/urandom (better). Neil Nelson

I create within a class the MT object with

static boost::mt19937 m_random;

so I need for a static variable for the initialization value, so I do this with

boost::mt19937 tools::random::m_random( time(NULL) );=

Now: My question is, can I use the time() value for initialization the MT object, so that the MT object returns values with a good entropie or should I need another initialization value like a UUID of the OS?

Because the time function (http://www.cplusplus.com/reference/clibrary/ctime/time/ ) returns a time_t value, so is this value good for initialization or should I need another value, if yes, which value if a good choice for initialize the MT object?