cpus must have aes-ni support?
The following Intel processors support the AES-NI instruction set: ... Westmere-EP (a.k.a. Gulftown Xeon 5600-series DP server model) processors. Clarkdale processors (except Core i3, Pentium and Celeron) Arrandale processors (except Celeron, Pentium, Core i3, Core i5-4XXM)