In markets that trade natural products, such as agricultural, fishery, energy, and commodities markets, oversupply or at least excess supply causes problems. When supply is high, prices plummet, causing significant damage to producers; conversely, when supply is low, prices rise, and consumer sentiment diminishes. As a result, both suppliers and consumers suffer. The challenge is that it is difficult to intentionally set the level of production. Because of this, a futures market develops in situations where we have to accept what nature provides. Futures trading is a method in which a producer and a distributor agree in advance to trade the price of an item to be produced in the future, without knowing the exact quantity yet. In other words, in futures trading, the focus is on price rather than quantity. Since it is challenging to stock items that require freshness, futures trading offers advantages by allowing transactions to be made in advance. However, if supply fluctuates too much,...
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"