Hi there --
Thanks for your reply. Based on your answer, the command in question:
$cmd= "(cd $source; tar -cvf - . |openssl des3 -salt -k $password > $destination/archive.tar.des3)";
Could be changed to one of the following:
$cmd= "(cd $source; tar -cvf - . |openssl aes128 -salt -k $password > $destination/archive.tar.aes128)";
$cmd= "(cd $source; tar -cvf - . |openssl aes256 -salt -k $password > $destination/archive.tar.aes256)";
The speed issue would probably be dependent on the CPU. That being the case, it would probably take, in theory, twice as long to encrypt the file using aes256 as opposed to aes128 encryption. Correct?
One other question: Is des3 truly 168-bit encryption due to its triple layer of 56-bit, or is it three separate 56-bit instances of DES? Thanks.