Existing economics teaches us that mankind invented the monetary system because barter was inconvenient. Despite having a monetary system, people still felt that even currency issued by it was inconvenient; therefore, economists explain that they created the current credit economy system. However, evidence found by anthropologists contradicts that explanation. In other words, it is argued that the credit transaction system existed before the monetary system, and then the credit system became distrusted for some reason. As a result, the monetary system was created and eventually replaced. Cryptocurrency today is a mathematical algorithm that makes it impossible to forge or alter transaction records. This happened because we don’t trust humans, and in ancient times, there was a more advanced credit transaction system. Don’t be fooled into thinking that the present is more advanced than the past. - 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"