SSH Tectia

Security Services

There are three core security services that are essential requirements for a secure remote access technology.

Non-repudiation is also usually mentioned along with these three services. Non-repudiation is a security service that prevents an entity from denying previous commitments or actions. However, in the context of communications security, non-repudiation is difficult to apply.

Note that the terms authentication and authorization refer to different actions. Authentication is the act of verifying the identity of an entity whereas authorization is the act of verifying whether the identified entity is allowed to perform a task such as reading a file. Authentication usually precedes authorization. Authorization is determined by an access control system.

The Secure Shell protocol provides the confidentiality, integrity, and authentication services.