How to quickly create an encrypted archive in OS X
To make sending multiple files by e-mail or other means easier, Apple includes a quick Finder contextual menu option to zip a selection of files and folders into an archive, which not only will ensure that the files stay together, but can also greatly reduce their size for the file transfer. While convenient, Apple does not provide a means to encrypt or secure the contents of the ZIP archive with a password; however, there is a way to do this if needed.
To place a file or folder into a ZIP file that is encrypted, you will need to use the Terminal and perform the following actions:
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