OPIE and S/Key authentication

[Stanislav Maslovski <stanislav.maslovski@gmail.com>]

Hello,

What do you say, can MD5-based OPIE system be still considered secure?
In the repository there are opie-server and opie-client.

Do I understand right that the strength of this system is the strength of
one step of MD5? Are there any alternatives where a different hashing
function can be choosen (if that is advisable)?

-- 
Stanislav