LONDON--(BUSINESS WIRE)--Garrison, the specialist provider of ultra-secure web browsing technology, today announced it has raised $30m in additional funds from London-based investors. The company’s unique technology enables users to access all content on the web without any risk of exposing their organisation to cyber-attack. Instead of relying on a traditional threat detection-based model, it uses a revolutionary technique to place a gap at the most fundamental electronic level between the int.