Let’s think about it this way. If you run a business and only make one transaction per day, chances are you won’t keep a record of those transactions because you can remember them. However, if there are hundreds of transactions in a year, or even in a single day, will you be able to remember all those transactions? A business makes a profit, but do you know how much you have earned or how much you’ve lost? After all, if we don’t keep the books, we can’t know the profit or loss. Those book records are called financial statements (balance sheets). You can do business without reading and understanding financial statements, but you’re just doing the hard-working, foolish thing without knowing the real content of the business. - 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"