The following protocols have not been modelled for use in Scyther:

- CAM http://www.lsv.ens-cachan.fr/spore/cam.html
This protocol only consists of one message and corresponding database actions.
The description given in SPORE is unsuitable for formalisation.

- Diffie Helman http://www.lsv.ens-cachan.fr/spore/diffieHelman.html
This protocol relies on algebraic properties that can not be modelled in
scyther.

- GJM http://www.lsv.ens-cachan.fr/spore/gjm.html
This protocol contains complicated if-then-else constructions that can
not be modelled in scyther.

- Gong http://www.lsv.ens-cachan.fr/spore/gong.html
This protocol relies on algebraic properties that can not be modelled in
scyther.