We often overlook the financial concept of “opportunity costs” because there is no immediate cash expenditure involved. Typically, we invest more time and effort in purchasing cheaper products. In contrast, wealthy individuals do not have to exert as much effort as those with fewer financial resources. When we factor in opportunity costs, we often find ourselves spending a similar amount of money on the same items, regardless of wealth status. For instance, if Bill Gates picks up a dollar that someone has dropped, he actually detracts from his financial standing due to the opportunity costs associated with the value of his labor. In this regard, he might save more money by choosing to rest instead of working. Ultimately, opportunity costs are the hidden expenses that can keep us in financial distress in the real world. - 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"