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Paper against coronavirus

03.12.2020

In the Czech Republic, scientists have invented a special paper that destroys various types of viruses, including the new coronavirus. The researchers hoped that representatives of the Treasury, as well as enterprises printing documents of national importance, would be interested in their discovery. But it turned out that there is much more demand for such paper in ordinary hospitals.

Previously, it was experimentally proved that coronavirus persists on paper for a day. On a novelty presented by the Czech Institute of Chemical Processes, viruses die within half an hour. The secret is that during production, a special composition with zinc and silver is added to the paper.

Initially, the researchers believed that their paper could be used to print banknotes, certificates, transport tickets. Now it has become clear that such a sphere of use is real, but much more new paper is in demand in hospitals: you can write medical prescriptions on it, use it for pasting walls in sterile wards. Even hospital sterile paper medicine stands will greatly reduce the viral and bacterial load.

Compared to sprays and liquid antiseptics, paper has an undeniable advantage: it works constantly, for many years, until it rots itself. By increasing the content of the antiseptic additive in the paper, it is possible to make the viruses lose their virulence faster. So, scientists believe that in the future it is possible to bring the time of destruction of the coronavirus to five minutes. In addition to viruses, such paper will also be fatal for some common types of bacteria, for example, for Staphylococcus aureus, which causes sore throats and purulent skin lesions.

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You can disrupt the operation of the HDD with the sound of ordinary speakers 30.05.2018

Security researchers at the University of Michigan in the US and Zhejiang University in China have been investigating acoustic attacks that can cause hard drive mechanics to fail and, as a result, damage both hardware and software. The attack does not require special equipment: an attacker can use conventional built-in speakers or connected acoustics to cause permanent errors in the target system.

"Our experiments have shown that audible sound causes the head stack assembly (HSA) to vibrate more than operating standards allow; and ultrasonic noise causes false alarms of the shock sensor, which is designed to prevent head failure. The identified problem can create great difficulties for magnetic hard drives, which are still very common in security-critical applications such as medical devices and other heavily used systems," the researchers said.

Modern mechanical hard drives use sensor-based proactive controllers to adjust the position of the hard drive head. Using ultrasonic vibrations, an attacker can cause false alarms, leading to head parking. Audible signals can also cause the read/write head to vibrate, resulting in poor positioning over the magnetic surface and operation outside of normal parameters. The hard drive will not function as intended by the manufacturer, which can damage both the drive itself and the files stored on it.

"An attacker can attack a hard drive by causing vibration through acoustic emitters built into the victim system (or the closest one to it) ... The attack will be more likely to be successful, the more powerful or physically closer the sound emitter is to the target drive," the statement says. research.

Using this type of attack requires the hacker to have access to nearby speakers. This is obviously problematic, especially for remote attacks. However, the researchers note that something similar can be done with even the simplest phishing attack or otherwise execute malicious JavaScript code on the victim's computer that would play harmful sounds through the system's speakers.

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