Rapid7 warned this week that its Nexpose appliances were shipped with a SSH configuration that could have let obsolete algorithms be used for key exchange. Rapid7 encouraged owners of its Nexpose ...

Key exchange using “classic” Diffie-Hellman is also disappearing from the SSH server, as it offers no performance advantages over key exchange using elliptic curves or quantum-safe algorithms.

Post-quantum cryptography has arrived by default with the release of OpenSSH 9 and the adoption of the hybrid Streamlined NTRU Prime + x25519 key exchange method. "The NTRU algorithm is believed ...

More technically speaking, Curve25519 is a key exchange algorithm while ChaCha20-Poly1305 is being used to encrypt and authenticate data transmitted over the secure channel. You can still use ...

Regarding the new key-exchange mechanism, Miller said the new release would use the hybrid Streamlined NTRU Prime + x25519 key exchange method by default ("[email protected]").

Authentication of key exchange data is nothing more than signing with a private key. And, OpenSSH typically uses ssh-dsa or ssh-rsa keys for this purpose. In other words, a combination of DH and ...

This manipulation lets attackers remove or modify messages exchanged through the communication channel, which leads to downgrading the public key algorithms used for user authentication or ...

Cybersecurity researchers from the Ruhr University Bochum, Germany, have discovered a way to crack OpenSSH connections and effectively break SSH channel integrity. In an academic paper published ...

A new version of OpenSSH, an implementation of the secure shell protocol, includes a switch to a new key-exchange mechanism by default, among other changes. An advisory from developer Damien ...