I'm wondering where exactly Seahorse is storing the keyring data?

Most available information points to ~/.gnome2/keyrings/, however, this directory contains only two very small files (login.keyring, 105 bytes and user.keystore, 207 bytes) which are definitely not large enough to contain the over 20 keys stored in my login keyring. I'd like to include the actual keyring data in my backup, so where is it?