SSH Keys

About SSH Keys

SSH Keys-Secure Shell (better known as SSH) is a cryptographic network protocol that enables users to perform a number of network services securely over insecure networks. The SSH key provides a safer path than using only a password to enter the server with SSH. Passwords can eventually be solved by brute force attacks, but it is almost impossible to decrypt SSH keys with brute force.

Creating key pairs gives you two long character sequences: public and private keys. You can place a common key on any server and then open it by linking it to a customer with a private key. When both match, the system opens without the need for a password. You can further increase security by protecting private keys with passwords.

In some of the commands in this tutorial, you will see some of the highlighted values. This is a variable and you need to change it to your own value.

SSH switch

The SSH key is the access information in the SSH protocol. The functions are similar to a user name and password, but the key is mostly used for automated processes and to implement a single login system by system administrators and electrical users.

The SSH key is authentication information.

SSH (Secure Shell) networks are used to manage operating systems and configurations. It is also in many file transfer tools and configuration management tools. Every big company uses it in every data center.

The SSH switch provides automation that enables modern cloud services and services connected to other computers to be possible and cost-effective. They offer improved comfort and safety when properly managed.

Functionally, the SSH key is similar to a password. They provide access and control over who can access what. Identity and access management requires the same policy, provision and termination as user accounts and passwords. A person cannot have confidentiality or integrity without checking the SSH keys or cannot guarantee continued system availability.

Technically, the key is an encryption key that uses public key cryptography. However, it is functionally authentication information and should be managed in this way.
The official key determines who can access each system

The official key is the public key that provides access. They are similar to the key that can be opened with the appropriate private key. For more information, see the special page on the official key.

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Identity key identifies the user and provides access

 The ID key is the private key that the SSH client uses to verify itself when it enters the SSH server. They are similar to physical keys that can open one or more keys.

Official keys and identity keys are collectively called user keys. These are related to user authentication that is contrary to the host key used to verify the host.

For more information, see the special page in the ID key.

Certificate-based user authentication

PKI certificates can also be used for authentication. In this case, the user still has a private key, as well as a certificate attached to that key. This technology is supported by some differences in Tectia SSH and OpenSSH. For more information, see the specific page for certificate-based authentication in SSH. 

Device verification switch

The host key authenticates the server

The host key is used to verify the identity of the host computer, for example. Their aim is to prevent the attack from people. For more information, see the separate page on the host button.

Certificate-based host authentication can be a very attractive alternative to large organizations. This allows the device's authentication key to be easily rotated and managed, and each connection needs to be secured.

Known host keys

A unique feature of SSH is that by default SSH trusts and remembers the host key when it is first connected. This is the main differentiator that provides the deployment of SSH, because in 1995 there was no central key infrastructure for hosts and still today (2017) with the issuance of SSL certificates for web servers. The ease of placement is one of the main reasons for SSH to be successful.

The stored host keys are called known and stored host keys in files that are known as hosts in OpenSSH. Unless the host key is changed, this assignment is very easy to use and provides good security. However, in large organizations and when the key changes, maintaining a known host file may take a lot of time. We recommend that you use a certificate for the host key. Tectia supports SSH, X certificates. 509 standard for servers. SSH Keys. OpenSSH has its own certificate format. Standard The advantage of based certificates is that they can be issued by any certification authority (CA) and that there are no trusted CAs for the OpenSSH key. For more information, see a special page with the SSH in the certificate.

Session key

The session key in SSH is the encryption key that is used to encrypt most of the data in a connection. The session key is negotiated during a network connection and then used with a symmetric encryption algorithm and message authentication code algorithm or command to protect data.