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This is an article about a malicious program, which is called Cryp1. It is a virus that enters a person's computer, encrypts every one of the files that it could, and requirements a ransom for decryption. Such viruses are classified as ransomware, and they are considered probably the most dangerous varieties of viruses. Their danger is in the belief that they pursue a certain goal so when desire to is achieved - an individual is a a disadvantage: the guy can either accept give the money, or lose his data, which can be very valuable. Cryp1 virus encrypts files with all the RSA algorithm. This algorithm is one of probably the most complex on the planet, and it is used not only by hackers, but additionally through the governments and also the military forces of several countries, such as United States. The code is indeed complex, that it is difficult to crack it with no key. More precisely, it will be possible, but requires enormously powerful computer plus an immense period of time. Of course, a normal user can?t decrypt your data, and, frequently decides to cover a ransom.
The rapid development of air filters is closely related to the development of military industry and electronic industry. In the first world war, the use of various chemical agents, asbestos fibre filter paper as the smoke filter layer of military gas masks came into being. The glass fiber filter medium is used in air filtration to obtain a patent in the United States in October 1940. In the 1950s, the United States studied the production process of glass fiber filter paper, and the air filter was improved and developed. In the 1960s, HEPA filters came out; In the 1970s, the filter paper of fine glass fiber was used as the HEPA filter of filter medium, and the filtration efficiency of particle size of 013 micron particle diameter was 99.9998%. Since the eighty s, with the emergence of new test method, use evaluation to improve and to improve the filtering performance requirements, found the HEPA filter there is a serious problem, and he had a higher ULPA filter performance. Countries are still working on it and expect more advanced air filters soon
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