De-perimeterisation
In information security, de-perimeterisation is the removal of a boundary between an organisation and the outside world. De-perimeterisation is protecting an organization's systems and data on multiple levels by using a mixture of encryption, secure computer protocols, secure computer systems and data-level authentication, rather than the reliance of an organization on its network boundary to the Internet. Successful implementation of a de-perimeterised strategy within an organization implies that the perimeter, or outer security boundary, was removed. Metaphorically, de-perimeterisation is similar to the historic dismantling of city walls to allow the free flow  of goods and information. To achieve this there was a shift from city states to nation states and the creation of standing armies, so that city boundaries were extended to surround multiple cities. "De-perimeterisation" was coined by Jon Measham, a former employee of the UK's Royal Mail in a research paper, and subsequently used by the Jericho Forum of which the Royal Mail was a founding member. Potential benefits. Claims made for removal of this border include the freeing up of business-to-business transactions, the reduction in cost and the ability for a company to be more  agile. Taken to its furthest extent an organisation could operate securely directly on the Internet. Operating without a hardened border frees organizations to collaborate, utilizing solutions based on a Collaboration Oriented Architecture framework. Variations. More recently the term is being used in the context of a result of both entropy and the deliberate activities of individuals within organizations to usurp perimeters often for well-intentioned reasons. The latest Jericho Forum paper named "Collaboration Oriented Architecture" refers to the trend of de-perimeterisation as a problem: Problem The traditional electronic boundary between a corporate (or ‘private’) network and the Internet is  breaking down in the trend which we have called de-perimeterisation. Variations of the term have been used to describe aspects of de-perimeterisation such as: