ecryptfs in lucid amd64 doesn't support openssl?

Man reads:
              Parameters that apply to individual key modules have the alias
              for the key module in the prefix of the parameter name. Key
              modules are pluggable, and which key modules are available on
              any given system is dependent upon whatever happens to be
              installed in /usr/lib*/ecryptfs/. By default, this includes, at
              a minimum, "passphrase" and "openssl."

Great. I have done `sudo aptitude install ecryptfs-utils libecryptfs-dev libecryptfs0` and ran `ls /usr/lib*/ecryptfs/` and what I see?

[stanis@dinexi ~] % ls /usr/lib*/ecryptfs/ [5:20:39]
/usr/lib64/ecryptfs/:
libecryptfs_key_mod_passphrase.so

/usr/lib/ecryptfs/:
libecryptfs_key_mod_passphrase.so

I see the passphrase here. I don't see openssl, which, as the man states, should be available "at a minimum". Why?