Can the encryption option on Info-ZIP be used from the command line? The zip man page says:
-e --encrypt Encrypt the contents of the zip archive using a password which is entered on the terminal in response to a prompt (this will not be echoed; if standard error is not a tty, zip will exit with an error). The password prompt is repeated to save the user from typing errors.
Is there a way to create zipped files from an unattended script?