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What is session key in SSH?
A session key in SSH is an encryption key used for encrypting the bulk of the data in a connection. The session key is negotiated during the connection and then used with a symmetric encryption algorithm and a message authentication code algorithm to protect the data.
How do I find my SSH session key?
1. Create a Key Pair on Your Computer
- Open a terminal window. At the shell prompt, type the following command: ssh-keygen -t rsa.
- The ssh-keygen program will prompt you for the location of the key file.
- Note the location to which your public and private key were saved; they will be required in a subsequent step.
What are session keys used for?
A session key is a symmetric key that is good for only one communication session. It is generated and used to encrypt all communications within just one conversation or exchange.
What SSH key consists of?
SSH keys always come in pairs, and every pair is made up of a private key and a public key. Who or what possesses these keys determines the type of SSH key pair. If the private key and the public key remain with the user, this set of SSH keys is referred to as user keys.
Why are SSH keys used?
Benefits of SSH Key Authentication SSH is also resistant to brute force attacks and protects against certain attack vectors being used to gain access to remote machines. Public key encryption ensures that passwords need not be sent over the network, providing an additional layer of security.
How are session keys, public / private keys generated on the SSH server?
The client has a public & private key pair. The server has a public & private key pair. The client and server exchange their public keys. The client now has its own key pair plus the public key of the server. The server now has its own key pair plus the public key of the client. This exchange of keys is done over an insecure network.
How does a client get a session key?
The client takes its private key and the server’s public key and passes it through a mathematical equation to produce the shared secret (session key). The server takes its private key and the client’s public key and passes it through a mathematical equation to produce the shared secret (session key).
Where does the secret token for SSH come from?
It must be noted, however, that the secret token is specific to each SSH session, and is generated prior to client authentication. Once the key has been generated, all packets moving between the two machines must be encrypted by the private key.
What do you need to know about SSH connection?
The client must begin the SSH connection by initiating the TCP handshake with the server, ensuring a secured symmetric connection, verifying whether the identity displayed by the server match previous records (typically recorded in an RSA key store file), and presenting the required user credentials to authenticate the connection.