Has more fixed parameters and negotiates only the bulk cipherįull negotiation of cryptographic and compression algorithmsĮmploys the same algorithms and keys for incoming and outgoing connectionsĮncryption, MAC, and compression are negotiated independently for each connection’s direction Has one session channel for each connection Uses a strong cryptographic Message Authentication Code (MAC) Utilizes a modular approach with independent transport, authentication, and connection protocols Single monolithic protocol with no ability to customize transport, authentication, and connections Supports the following encryption algorithms: Has twice the security power and covers the vulnerabilities of SSH-1Īllows encrypted communication using the following algorithms: Provides a strong host-to-host and user authentication Find out the key features of each version in the table below. There are two main SSH versions : SSH -1 and SSH -2. SSH encrypts the connection between endpoints, making it an effective alternative to legacy login protocols and insecure file transfer methods. Through SSH, administrators can perform basic operations such as file transfers, deliver software patches, and manage systems remotely. The latest SSH suite of programs to emerge was OpenSSH in 1999.Īs a network protocol, SSH allows administrators to securely “log in” to remote assets without physically accessing the device.Aside from allowing the remote performance of administration tasks, SSH blocks forms of spoofing and eavesdropping on transmitted data.The protocol works in three stages: verification, generation of a session key, and authentication.SSH secures data exchange through symmetric encryption, asymmetric encryption, and hashing. The three SSH versions are SSH -1, SSH -2, and SSH -1.99.SSH protocol secures data sharing between computers and servers over an unsecured network.
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