One of the first things you need to do following your company's computer security breach, is to evaluate your losses. You must ask yourself the following question: What and how much has exactly been lost? Is this information going to hurt the future of my company? These are very worrying yet valid and important questions to ask. The good news is that a serious IT department can take the steps to analyse these issues promptly. They will be able to assess whether or not future breaches are likely as a result, as well as how much money you could potentially lose. If you do not already have a serious IT department, then take a cue from Sony Corporation. After their highly publicised hack, they hired a professional team to assess and fix the damage.
Some business owners panic and they attempt to get rid of other sensitive information before it can be stolen too. This is not necessary, however. Take steps such as changing your credentials for important servers and accounts located online. Another tactic is to completely remove or isolate machines, servers and other storage areas which contain important information if possible. Do not hesitate to consider giving your employees a day off of work to allow you and your IT team to place a complete focus on fixing and assessing the security breach. Employees themselves, however, play a huge role when it comes to security measures.
It is not paranoia to suspect that a human element was involved in your security breach. No matter how strong your security measures are, the truth of the matter is that employees represent the weakest link for security within your business. Some employees do not even realise they are hurting the business when they click an email link that contains malware. Education of employees is the key, as well as re-education. If they know what to look for once they are hired, then they will be much less likely to commit this error in judgement. Once a security breach occurs, identify and assess the problem so that you have a point of reference to use in the future.