[[!comment format=mdwn
 username="https://www.google.com/accounts/o8/id?id=AItOawl9sYlePmv1xK-VvjBdN-5doOa_Xw-jH4U"
 nickname="Richard"
 subject="comment 2"
 date="2013-08-02T07:21:50Z"
 content="""
Using symmetric keys is significantly cheaper, computation-wise.

The scheme of encrypting symmetric keys with asymmetric ones is ancient, well-proven, and generally accepted as a good approach.

Using per-key files makes access control more fine-grained and is only a real performance issue once while creating the private key and a little bit every time more than one file needs to be decrypted as more than one symmetric key needs to be taken care of.
"""]]