CFS pushes encryption services into the Unix(tm) file system. It
supports secure storage at the system level through a standard
Unix file system interface to encrypted files. Users associate a
cryptographic key with the directories they wish to protect.
Files in these directories (as well as their pathname components)
are transparently encrypted and decrypted with the specified key
without further user intervention.
CFS employs a novel combination of DES stream and codebook cipher
modes to provide high security with good performance on a modern
workstation. CFS can use any available file system for its
underlying storage without modification, including remote file
servers such as NFS.
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