Ssh-keygen example

1. How do I name my ssh-keygen?
2. What does ssh-keygen do?
3. What is in ssh-keygen command?
4. Is Ed25519 better than RSA?
5. How do you get the 2048 RSA key in Linux?
6. Where can I find id_rsa pub?
7. What is id_rsa pub?
8. What is ssh-keygen in Linux?
9. Why are Ed25519 keys so short?
10. Why is Ed25519 more secure?
11. Does AWS support Ed25519?

How do I name my ssh-keygen?

You need to name the SSH key in the Choose a name for this key field. The default key name is id_rsa . Using the default name will allow SSH clients to automatically locate the keys so it is strongly recommend you use the default name (simply leave the field blank or fill it with id_rsa ).

What does ssh-keygen do?

ssh-keygen generates, manages and converts authentication keys for ssh(1). ssh-keygen can create keys for use by SSH protocol version 2. The type of key to be generated is specified with the -t option. If invoked without any arguments, ssh-keygen will generate an RSA key.

What is in ssh-keygen command?

ssh-keygen- Creation, management, and conversion of keys used for client and server authentication. You can use the ssh-keygen command line utility to create RSA and DSA keys for public key authentication, to edit properties of existing keys, and to convert file formats.

Is Ed25519 better than RSA?

Ed25519 is probably the strongest mathematically (and also the fastest), but not yet widely supported. At least 256 bits long. RSA is the best bet if you can't use Ed25519. At least 3072 bits long.

How do you get the 2048 RSA key in Linux?

Run ssh-keygen command. $ ssh-keygen Generating public/private rsa key pair. ssh-keygen will generate a 2048 bit rsa key pair if no option is specified. You can change the key's bit size and type by using -b and -t options respectively as the following example.

Where can I find id_rsa pub?

ssh/id_rsa and the public key is stored in ~/. ssh/id_rsa. pub . The private key should only be kept on your local system and should be encrypted using a passphrase that is at least as strong as any password you would normally use.

What is id_rsa pub?

id_rsa. pub is your RSA *public* key, which, when supplied the remote host (via an 'authorized keys' file, publishing it in the DNS, or other means) allows the host to authenticate your connection as being originated by you, and decide whether or not to accept it as a result.

What is ssh-keygen in Linux?

ssh-keygen is the utility used to generate, manage, and convert authentication keys for SSH. ssh-keygen comes installed with SSH in most of the operating systems. ssh-keygen is able to generate a key using one of three different digital signature algorithms. RSA.

Why are Ed25519 keys so short?

From my perception ed25519 is the more recent and secure format. So why isn't longer better here? It is a completely different type of cryptography and therefore has same security at different keysizes. It's not really about the length.

Why is Ed25519 more secure?

The Ed25519 was introduced on OpenSSH version 6.5. It's the EdDSA implementation using the Twisted Edwards curve. It's using elliptic curve cryptography that offers a better security with faster performance compared to DSA or ECDSA.

Does AWS support Ed25519?

Starting today, AWS customers can use ED25519 keys to prove their identity when connecting to EC2 instances. ED25519 is an elliptic curve based public-key system commonly used for SSH authentication. ... EC2 customers can now also use ED25519 key pairs in addition to RSA based key pairs.