First of all it depends on the type of business if the .COM is important. You are starting a "security product business" but who exactly are you targeting? If

First of all it depends on the type of business if the .COM is important. You are starting a "security product business" but who exactly are you targeting? If you are selling to the "general public", or even large organisations etc then the .COM should be your only choice. Consumers have grown to believe that all .COMs are reliable and trustworthy - which is something you want your brand to leverage. Having said that .COMs aren't as important as they once were and if you aren't targeting the "general public" then you can consider an alternative domain such as .ly etc