A hearing aid specialist, also known as a hearing instrument specialist, is a professional who evaluates people with hearing problems and chooses the best hearing aid to improve their condition. Hearing loss is frequently encountered among the elderly, but also in younger people.
For other uses, see SSH (disambiguation). Secure Shell (SSH) is a cryptographic network protocol for operating network services securely over an unsecured network. The best known example application is for remote login to computer systems by users.
SSH establishes encrypted connections by the exchange of host keys. When a remote system gives your local system its host key it is basically telling your local system how to encrypt data so that the remote system can then unencrypt it.