Using ssh-keys from Openssh to Tectiassh and vice-versa

How to find the server is Openssh or Tectiassh
> ssh -V

Configuration starts from here

1. On SERVERA with Openssh:

 1. ssh-keygen -t rsa
 2. cd .ssh
 3. It creates two files id_rsa and id_rsa.pub
 4. Create a file authorized_keys and copy/paste id_rsa.pub into it.
 5. ssh-keygen -e -f id_rsa.pub >Openssh_to_Tectiassh