Zero-trust security is a new form cyber-security which works on the principle of zero-assumed trust. The security solutions require each and every insider and outsider to provide authentic verification before entering the secure network. The principle is gaining popularity as it has shown capabilities in stopping security breaches. Additionally, it also promises a cost-effective, simple-to-use, and reliable security mechanism. The security system is in contrast with conventional castle and moat approach to security. In earlier approaches, insiders were trusted by default. This made it difficult to oversee a transfer of communication and created several challenges as information transferred freely from inside-out with often complex, cumbersome, and sometimes extremely risky manner. A recent study by IBM shows that the cost of security breach on average is 3 million US dollars. Simple mechanism used by the zero-trust security solutions makes them effective for building trust and remaining cost-effective in the long run.