Curated via HostStud.com / https://hoststud.com/resources/what-is-the-difference-between-ssh1-ssh2.278/
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Today, we will learn about the SSH1 and SSH2 and what are the differences between them.
SSH1 (Secure Shell) provides an encrypted channel to users for logging into remote computer over a network. We can execute various commands on server and move files from one server to another. Also it provides strong host-to-host and user authentication. Also provides secure encrypted communications over the Internet.
Whereas, SSH2 is a much more secure, efficient, and portable version of SSH that includes SFTP, which is functionally similar to FTP, but SSH2 encrypted.
Now we will check some of the protections that SSH2 provides over SSH1 are:
1). Eavesdropping:- SSH2 encrypts all the data which protects against eavesdropping, making it unreadable to potential eavesdroppers.
2). DNS and IP Spoofing:- SSH2 avoids such attacks by cryptographically authenticating the identity of the server. When a session is established, the SSH client validates the server’s host key against a local list of available keys that are associated with server names and addresses. If the keys do not match, then an immediate warning is issued.
3). Man in the Middle:- SSH2 can protect against man-in-the middle attacks by server-host authentication. Because the attacker does not have the server’s private host key.
Second, SSH2 provides is stronger authentication for the client. passwords are vulnerable, but public keys and certificates are essentially immune to these types of attacks.