Public-key authentication is based on the use of digital signatures. Each user creates a pair of key files. One of these key files is the user's public key, and the other is the user's private key. The server knows the user's public key, and only the user has the private key.
The key files must be stored in a location where the user has the
read rights), but that is not accessible to others. These
user-specific rights are required for the
key.pub file, the
authorized_keys directory, and for the
authorization file, if used.
When the user tries to authenticate, the client sends a signature to the server, and the server checks for matching public keys. If the key is protected with a passphrase, the server requests the user to enter the passphrase.
Do not store your private keys in a location accessible to other users.
To use public-key authentication with Tectia client tools for z/OS, do the following actions:
For instructions on using public-key authentication to connect from other hosts to Tectia Server for IBM z/OS, see Using Public-Key Authentication from Other Hosts to z/OS.
In the instructions in the following sections,
Server is the remote host running the Secure Shell server that you are
trying to connect to.
ServerUser is the user name on
Server that you are logging
Client is the host running the Secure Shell client (Tectia client tools for z/OS).
ClientUser is the user name on
Client that should be allowed
to log in to
The instructions assume that
ClientUser is allowed to log in to
ServerUser using some other authentication method