How much is a billion? A billion of anything, let alone dollars, is a lot.  A billion is 1,000 million. If you stack one billion $1 banknotes on top of each other, the pile would reach 68 miles upwards into the sky.

When it comes to investing money, whenever you hear of a billion dollars being spent, you just know that there is serious money to be made.

One raising as a rocket industry where billions are being spent is blockchain. And this number is growing drastically every year.

Experts warned that the Alpine Linux Docker images, which had been distributed through the official Docker Hub for about three years, used an empty password (NULL) for the root account. The problem affected all versions of Alpine Linux since 3.3. It is worth noting that Alpine Linux is one of the most popular distributions on the Docker Hub, with more than 10,000,000 installations.

The vulnerability received the identifier CVE-2019-5021, and in this case it is interesting that it was not discovered for the first time. The problem was already paid attention in August 2015 and corrected in November. But only three weeks after the patch was released, in December 2015, the bug accidentally returned to the code, and was seen again only in January of this year by analysts. At first it was thought that the problem only affected the Glider Labs Alpine Linux image, but then it became clear that the official images had also suffered.

Radio Frequency Identification (RFID) is a technology for automatic contactless identification of objects using a radio frequency communication channel. Now this technology has no analogues, and its use has become so popular that, according to experts, RFID will soon replace bar-coding technology.
1. A basic RFID system consists of
radio frequency tag;
information reader (reader);
computer for information processing.
The identification of objects is carried out using a unique digital code that is read from the memory of the electronic tag attached to the identification object. The reader contains a transmitter and an antenna through which the electromagnetic field of a certain frequency is radiated. The radio-frequency tags that fall within the range of the reading field “respond” with their own signal containing information (product identification number, user data, etc.). The signal is captured by the antenna reader, the information is decoded and transmitted to the computer for processing.