What is SSH and RSA?

SSH keys come in many sizes, but a popular choice is an RSA 2048-bit encryption, which is comparable to a 617 digit long password. On Windows systems, it is possible to generate your own SSH key pair by downloading and using an SSH client like PuTTY.

Is RSA used in SSH?

The SSH-1 protocol specifies use of RSA explicitly.

What is SSH1 and SSH2?

SSH1 and SSH2 encrypt at different parts of the packets, and SSH1 uses server and host keys to authenticate systems where SSH2 only uses host keys. SSH2 is a complete rewrite of the protocol, and it does not use the same networking implementation that SSH1 does. Also, SSH2 is more secure.

What is the protocol for SSH?

SSH or Secure Shell is a network communication protocol that enables two computers to communicate (c.f http or hypertext transfer protocol, which is the protocol used to transfer hypertext such as web pages) and share data.

Is SSH RSA part of the key?

SSH keys are generated in pairs and stored in plain-text files. The key pair (or keypair) consists of two parts: A private key, usually named id_rsa .

How do RSA keys work?

An RSA user creates and publishes a public key based on two large prime numbers, along with an auxiliary value. The prime numbers are kept secret. Messages can be encrypted by anyone, via the public key, but can only be decoded by someone who knows the prime numbers.

Which encryption does SSH use?

The SSH protocol uses industry standard strong encryption algorithms, like AES, to secure the communication between the involved parties. In addition, the protocol uses hashing algorithms, such as SHA-2, to ensure the integrity of the data transmitted.

What is a RSA key?

RSA key is a private key based on RSA algorithm. Private Key is used for authentication and a symmetric key exchange during establishment of an SSL/TLS session. It is a part of the public key infrastructure that is generally used in case of SSL certificates.

Is RSA an SSH2?

It explicitly mentions that all key types (with obvious exception of the “SSH-1 (RSA)”) are for SSH-2. The current version of the SSH protocol, SSH-2, supports several different key types, although specific servers may not support all of them. PuTTYgen can generate: An RSA key for use with the SSH-2 protocol.

Is SSH version 2 secure?

SSH is a secure method for remote access to router/switch. SSH requires a RSA public/private key pair. SSH version 2 is more secure than version 1.

What is the difference between SSL and SSH?

The key difference between SSH vs SSL is that SSH is used for creating a secure tunnel to another computer from which you can issue commands, transfer data, etc. On the other end, SSL is used for securely transferring data between two parties – it does not let you issue commands as you can with SSH.

How do you use SSH?

How to Connect via SSH

1. Open the SSH terminal on your machine and run the following command: ssh your_username@host_ip_address.
2. Type in your password and hit Enter.
3. When you are connecting to a server for the very first time, it will ask you if you want to continue connecting.

What is the SSH protocol 2?

SSH protocol 2 allows you to use DSA, ECDSA, ED25519 and RSA keys when establishing a secure connection to a server. (Keep in mind for this question that I’m only familiar with the procedure and capabilities of RSA, and can’t speak for the other methods)

How do I generate an RSA key for SSH-1?

PuTTYgen can also generate an RSA key suitable for use with the old SSH-1 protocol (which only supports RSA); for this, you need to select the ‘SSH-1 (RSA)’ option. Since the SSH-1 protocol is no longer considered secure, it’s rare to need this option.

What is the use of Diffie-Hellman key in SSH protocol 2?

SSH protocol 2 allows you to use DSA, ECDSA, ED25519 and RSA keys when establishing a secure connection to a server. (Keep in mind for this question that I’m only familiar with the procedure and capabilities of RSA, and can’t speak for the other methods) What confuses me, is according to man sshd, Diffie-Hellman is used for the key exchange:

What SSH keys can be used with SSH-2?

A DSA key for use with the SSH-2 protocol. An ECDSA (elliptic curve DSA) key for use with the SSH-2 protocol. An Ed25519 key (another elliptic curve algorithm) for use with the SSH-2 protocol.