Netkey for Plan 9 clients
Netkey is a Plan 9 program that implements an encryption algorithm
to allow a remote Plan 9 user to connect securely to a Plan 9 service
such as telnet or ftp, without transmitting a password
in clear-text form across a network.
It replaces the use of a Securenet encryption box.
To connect using a non-Plan 9 system, you need either the
box, or an implementation of netkey
for whatever client system you have got to hand.
Here are references to
sources and/or binaries for implementations
of netkey's algorithm by various people
for non-Plan 9 client systems: