enables only remote connections at the exclusion of any other operations

has never had any vulnerability in the last 10 years

is coupled with scp for secure copy

uses Diffie-Hellman algorithm

is evaluated EAL5 by ANSSI and BSI

is available only as open-source, namely openssh

is available on Linux and Windows and MacOS since their creation

can be configured in order to select only some ciphers and hash algorithms

provides password-based and passwordless remote authentication

requires specific firmware in order to store the secret elements

is not configurable due to security concerns