A Tiny Crevice. In other words, it is also called an affordance, permissiveness, or tolerance. A 5mm hole and a 5mm rod don’t fit perfectly together. If you hit it with a hammer, the rod might go into the hole, but only by forcing it. If they are the same size, they don’t really fit. There needs to be a slight gap to ensure a proper fit, which is known as ‘engineering tolerance.’ In this world, 5mm exists only as a concept and doesn’t truly confirm its existence. For some, ‘tolerance’ might be seen as a mistake or imperfection, but for others, it’s a principle of life that drives the world and should be natural. - Joseph’s “just my thoughts”
For the security of the Internet service, we have been asked by the Internet service companies to set the password combined by more than 8 or 10 "uppercase letter+lowercase letter+number+special character". But it was obviously of no use. This security guideline was recommended by Bill Burr who worked at NIST in the USA, he suggested this way in his report. Furthermore, the user was required to change the initial password set regularly. Despite this measure, the best way of security to protect users' accounts was the notification of the alarm for attempted hacking when the hacker tried. We have only tried to change the keys despite the simple method meanwhile. Today, the world has begun to comprehend that the security problem is not encryption or confidentiality, but simply cyber-dominion control and communication. - Joseph's "just my thoughts"