Security is an important factor for people all over the world due to the existence of important information which may be stored on the computer or any other system, so you have to provide different facilities to protect this information and not allow others to access it, in the world of computers, security has many details, and to understand each of them, at the beginning, you need to be fully aware of the computer in general, so that you can maintain the security of your site better, security has 7 layers, which we will discuss in the following.

7 layers of security:

1- Information Security Policies:

One of the main layers of information security is Information Security Policies, which gives users the assurance that you give a value to their information and do your best to protect them, the security plans for people who want to protect information must be prearranged and should have a step-by-step process to strengthen the security of your site.In general, information security policies reflect the thoughts of the media and show all their efforts to protect information, through this layer of security , information can be secured against all existing threats.

This layer of security has 3 main types that we will mention in the following:

- Organizational (or Master) Policy- System-specific Policy- Issue-specific Policy

2- Physical Security:

This layer of security is always an important for many people, and they regularly provide facilities through which they can establish physical security to protect information, in the real world, if you have a valuable object, such as money, jewelry, documents, etc., you maintain this layer of security as fully as possible, for example, if you leave that valuable object in a safe place, or give it to someone who you trust, you are not worried about protecting them.The same thing is also true for computers, generally, physical security is defined as the protection of hardware and software components, networks, and data from natural physical conditions and events, which may cause serious damage to an organization and the information contained in them, in other words, physical security includes all measures to protect all hardware, information and software available against theft, natural disasters, etc., in order to achieve this kind of security, you must pay attention to some tips which help you keep your information safe.There may be different tips about the ways of establishing this layer of security which are different from each other, to establish this layer of security, you may choose a safe room with CCTV cameras, or restrict the access of different people to this room, which can also help you in protecting important information and other solutions that exists to ensure you that physical security is set up properly, it should also be noted that different there are different threats for this section, including, abnormal weather conditions, pouring coffee on the computer, people who target your information, etc., to establish security for each of these threats, certain principles are required. 

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