I am using openssl to encrypt a largish file(50GB). I have tried using aes128 and aes256, and both take around the same amount of time. I would think that aes256 should take atlease 20% longer than 128, as the program should be doing 4 more iterations.
I believe aes128 is 10 iterations, and aes256 is supposed to be 14, but based on my observations that may not be happening.
Is anyone familiar with this tool, or is there a way I'd be able to tell if a file is properly encrypted?
Thanks for any help provided.