Is AES 128 faster than 256?
Is AES 128 faster than 256?
AES-128 is faster and more efficient and less likely to have a full attack developed against it (due to a stronger key schedule). AES-256 is more resistant to brute force attacks and is only weak against related key attacks (which should never happen anyway).
How fast is AES-256?
It could decrypt using AES-256 GCM at around 120MB/sec on a single core. (While we know that speeds can vary between computers and implementations of encryption, this average benchmark speed will suffice for this analysis.)
How do you check if AES-NI is enabled?
Visit the following Intel website and look up the processor model to see if it supports AES-NI: http://ark.intel.com/search/advanced/?AESTech=true. Download CPU-Z application and run it on the client. This will display the CPU capabilities: http://www.cpuid.com/softwares/cpu-z.html.
Does BitLocker use AES-NI?