Hello, after some experiments, I came up with following 4 questions. I think that the answer to all of them is yes, but I would like to confirm this with the experts here: 1) A crypto map aes-xts-plain64:sha512 with a random 512bit key is created over a block device. When zeroes are written to the device through the crypto map (encrypting), does it generate quality random data on the block device (comparable to /dev/urandom)? 2) The same crypto map over a block device, but the block devices contains zeroes. When I read data, will it generate quality random data? (comparable to /dev/urandom or a random number generator?) 3) If yes should it be the fastest way to generate random data on a typical Linux computer, compared to reading /dev/urandom? (especially when having AES instruction support in the CPU) 4) If the data obtained by reading from the zeroed device through that crypto map (aes-xts-plain64:sha512) is written back to the block device (using the same crypto map and key), will you get the original data? (in this example zeros). Does the crypto map work in both directions? Encrypting and decrypting when write and read back, and also when read and write back? could somebody please give me some feedback? thanks, _______________________________________________ dm-crypt mailing list dm-crypt@xxxxxxxx https://www.saout.de/mailman/listinfo/dm-crypt
