#What is a security?
This time, the security which is the theme of our web page. What is fundamental security?
Let's look at the history of security and understand the essence of security here.
Security Definition『safety. security. Security.』(広辞苑 quoted from)
Currently, I think that many people think that security is only for protecting information. But safe as above. security.
Since security aspect is true, security applies in various fields. From this, what is the structure of information security?
Let's see what is the same and where the technology is new compared to classic security.
#Classical security
The concept of security has existed quite a long time ago. It is to protect our own safety. To protect our wealth. Various security was invented and implemented for various purposes.
Let's look back on with what kind of security we have.
Let's classify the classic security into two in this time. The first is "key" to avoid invasion from outside and protect property. And the second one is the "police" who will respond when we get something damaged.
Let's take a closer look at the key this time.
・"key"
Although there are various things even when saying "key" in a bite, here I think to talk about cylinder locks,
which are often attached to the entrance of the house. At first glance the structure is complicated,
but the basic structure is not much different from the beginning when invented. If this is made structurally simple,
Ward tablets familiar with animation etc., complicating the structure complicates the recent mainstream (?) Dimple lock.
Cylinder locks are key locks (unlocked) and locked and unlocked by unlocking the key, by removing a plurality of knocks stuck in the cylinder (cylinder), the key turns (for each inner cylinder). By the way, picking is common practice of unlocking the batters in the cylinder without using the key. (Do not try to manage good kids.) It is easy to remove the cylinder locks if there is a tool, but since the dimple locks are bolstered in the lateral direction in addition to the longitudinal direction (cylinder locks are vertical only ) Picking is difficult, and security prevention is said to be high. (The duplication of keys is also difficult.) Also, although there may be many people who have heard of it, there are types of keys that allow keys to be duplicated if the list of alphanumeric characters written on the key is known Be careful as you do.
In this way, "key" has evolved to protect safety from the threat of picking.
#Information security
I introduced past security so far. From here, I would like to introduce the information security that has become a very important element in the 21st century.
In current communication, many people send personal information via the net. In order to protect that personal information, security becomes essential. Therefore, Encryption appeared to protect information.（For more information is hereEncryption）
Through this technology, third parties can not intercept communication contents. It corresponds to the "key" in the so-called information society. However, Vulnerability may be discovered in this technology. (Eg WEP etc.) Vulnerability is a security flaw. That is, it is like the above cylinder lock. Please think that it will be picked relatively easily.
In order to counter it, new technology has emerged every day for information security as if dimple locks appeared. Many of them are distributed with update patches so be sure to update them.
In this way, the basic idea of security has not changed either now or in the past. Information security will continue to evolve from now on. Let's make sure that everyone, along with the evolution of security, add knowledge and take countermeasures not to suffer damage.
On this site, we handle from basic of information security to security of the future to a large extent. Please see to the end by all means.
#Summary
・Security is the same as before
・The security of the information society can be compared to the keys of the house etc. The basic idea of the technology that will be introduced in the future will not change either. It may be easy to understand when you replace confusing topics about security.
#Start from security basic
First of all, let's look at the basic and most important security, from the security department closely related to you.
