If you are running a current kernel r273872 or later, please upgrade your kernel to r278907 or later immediately and regenerate keys.
I discovered an issue where the new framework code was not calling randomdev_init_reader, which means that read_random(9) was not returning good random data. read_random(9) is used by arc4random(9) which is the primary method that arc4random(3) is seeded from.
This means most/all keys generated may be predictable and must be regenerated. This includes, but not limited to, ssh keys and keys generated by openssl. This is purely a kernel issue, and a simple kernel upgrade w/ the patch is sufficient to fix the issue.
https://lists.freebsd.org/pipermail/freebsd-current/2015-February/054580.html
А вы говорили Дебиан :}