Opportunity Cost: Making a choice means sacrificing something else at the same time because we can’t have everything. If the value of what is given up is significant, then the choice incurs a relative loss, and it is up to the CEO to recognize this as a cost. In reality, whether I am aware of the opportunity cost or not, it still impacts my current financial situation. However, to calculate profit or loss as an opportunity cost, there must be a future opportunity to forgo the current choice and select an alternative. No one should keep repeating the cycle of giving up and choosing without knowing whether the next decision will be beneficial or not. Giving up is worthwhile only when the next option is good. - 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"