xiaoxiang781216 commented on pull request #5837:
URL: https://github.com/apache/incubator-nuttx/pull/5837#issuecomment-1078693797


   BTW, from the manual:
   https://www.freebsd.org/cgi/man.cgi?query=arc4random_buf&sektion=3&n=1
   https://man7.org/linux/man-pages/man2/getrandom.2.html
   https://man7.org/linux/man-pages/man3/getentropy.3.html
   arc4random_buf is different from getrandom/getentropy. The second is 
designed return the true random number from hardware. arc4random_buf is a 
pseudo random number generator.


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