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eCryptfs - an enterprise-class cryptographic filesystem for linux
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eCryptfs is a POSIX-compliant enterprise-class stacked cryptographic
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filesystem for Linux. It is derived from Erez Zadok's Cryptfs, implemented
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through the FiST framework for generating stacked filesystems. eCryptfs
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extends Cryptfs to provide advanced key management and policy features.
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eCryptfs stores cryptographic metadata in the header of each file written,
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so that encrypted files can be copied between hosts; the file will be
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decryptable with the proper key, and there is no need to keep track of any
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additional information aside from what is already in the encrypted file
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itself. Think of eCryptfs as a sort of "gnupgfs."
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=head2 STANDARD OPTIONS
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=item B<key=(keytype):[Key Options]>
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Specify the type of key to be used when mounting eCryptfs.
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=item B<cipher=(cipher)>
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Specify the symmetric cipher to be used on a per file basis
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=item B<ecryptfs_key_bytes=(key_bytes)>
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Specify the keysize to be used with the selected cipher. If the cipher
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only has one keysize the keysize does not need to be specified.
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Allows for non-eCryptfs files to be read and written from within an
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eCryptfs mount. This option is turned off by default.
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=item B<verbosity=(level)>
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Seting verbosity prevents eCryptfs from interactively requesting for options
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to be entered. The mount will fail if an essential option is absent.
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=item B<passwd=(passphrase)>
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The actual password is password. Since the password is visible to utilities
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(like ’ps’ under Unix) this form should only be used where security is not
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=item B<passfile=(filename)>
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The password should be specified in a file with B<passwd=(passphrase)>. It is
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highly reccomended that the file be stored on a secure medium such as a
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=item B<passfd=(file descriptor)>
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The password is specified through the specified file descriptor.
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The user types their passphrase in through stdin.
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=item B<salt=(hex value)>
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The salt should be specified as a 16 digit hex value.
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=item B<keyfile=(filename)>
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The filename should be the filename of a file containing an RSA SSL key.
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Do not run eCryptfs in higher verbosity levels
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unless you are doing so for the sole purpose of development, since
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secret values will be written out to the system log in that case.
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Please send bug reports to the lead developer, an eCryptfs mailing
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list hosted from SourceForge, or to the SourceForge bug tracker for
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the eCryptfs project. For kernel bugs, please follow the procedure
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detailed in Documentation/oops-tracing.txt to help us figure out what
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doc/manpage/ecryptfs.pod
