The threat model is one of the most basic tools IT professionals use to analyze security incidents and scenarios. It is the first stop along the security path where potential hazards can be identified and quantified. Security analysts need a way to focus on what is relevant to the problem at hand. The environment plays a significant role in the threat modeling process. 2017: The Year of Metadata will bring metadata into sharper focus. It may even aim to enhance security, but client certificates are exchanged before the Transport Layer Layer (TLS) connection becomes encrypted.”]
Source: https://securityintelligence.com/the-threat-model-of-2017/