In this day and age, security should be near the top on the list of any company that wants to remain alive and competitive, but companies no longer only have to worry about physical intrusions. In the Internet age, data theft, hackers, and digital espionage are now true threats as well. One of the most important aspects of any company is the system in place for security access control. Authentication ensures a company’s security and privacy, allowing only authorized users to have access to important places or files. It also can limit what types of access each user, whether an individual or a system, is given. Companies can implement this in a number of ways, from user IDs and passwords to retinal scans and thumbprints. The added security provided with proper security access control brings with it a peace of mind.