https://unix.stackexchange.com/questions/209571/how-to-use-output-from-openssl-encryption-routines-in-a-pipe
tar czf - test | openssl enc -k testkey > test.enc
cat test.enc | openssl enc -d -k testkey > test.tgz
cat test.enc | openssl enc -d -k testkey | tar xzvf - -C test2/
with split
tar czf - test | openssl enc -k testkey | split - -b 1M -d lala-split
cat lala-split* | openssl enc -d -k testkey | tar xzvf - -C test2/