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 Wysłany: Pon 9:38, 10 Sty 2011 Temat postu: moncler outlet Electronic documents and paper file |
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Electronic documents and paper files technical differences in the protection of
Commonly used recording media are tellurium, tellurium alloy, selenium, carbon aluminum compounds and some under the laser thermal effect is easy to produce changes in physical and chemical properties of materials. These materials are unstable, easily oxidized, easy to react with the alkali solution. Compared with the carrier paper files,[link widoczny dla zalogowanych], electronic documents the life of carrier materials is much shorter, usually only 5 ~ l5 years. 2 different environmental conditions (1) temperature and humidity differences. Inappropriate temperature and humidity on the magnetic carrier, CD-ROM and paper implications. On paper, the temperature and humidity, can promote the hydrolysis of a paper oxidation, accelerated chemical composition of the paper within the negative impact on the paper, writing materials can also happen proliferation, Yin phenomenon. The carrier of electronic documents by means of different temperature and humidity. The temperature is too high or too low under the conditions of the end of the base polyester and easy expansion or shrinkage, the use of plastic carrier discs, aluminum and more carbon materials will be bent, and the precise positioning of the laser beam to read and write data. (2) The difference between dust impacts. The hazards of dust on the paper the paper is mainly mechanical wear, so that bonding occurs to form the paper \And dust damage to the vehicle electronic documents are physical damage, chemical damage and biological damage. Dust can damage both paper and electronic files carrier. Only on paper, even if the dust has been substantial damage to its production, such as wear and tear the paper to form a \. Once the dust hazards of electronic document carrier, the carrier recorded information may be partial loss, the computer system can not read the original information, so that loss of conservation value of electronic documents. Therefore,[link widoczny dla zalogowanych], carriers of electronic documents to prevent dust hazards are of particular importance in the formation and use of electronic documents, it is necessary to take strict anti Received Date :2008-04-28 · 1O4 · dust measures. 3 Technical paper documents differences in life, once formed, its made of materials - paper, writing materials, writing the three always together,[link widoczny dla zalogowanych], and the life of its internal factors and environmental protection conditions. The life of electronic documents not only the protection of its internal factors and environmental conditions, even with the technological innovations related. Because electronic documents through the computer information and carrier together to form, and must be reading through the computer. Once the technology out of date,[link widoczny dla zalogowanych], the carrier can not read the information. Outdated technology performance has two aspects, one technological innovation, so that the old storage technology disappear. Second, because of commercial reasons, so that manufacturers or sold by a single electronic file device manufacturers due to bankruptcy or change in production and hard to find matching products. Generally speaking, most of the electronic document vector life expectancy than reading it time hardware and software technology, that is, outdated technology on the security of electronic documents is even more important. Therefore, for electronic documents in the long-term access to digital information, the outdated technology than the vehicle damage is more serious harm. 4 different paper-based information protection file protection goal is to make the file vector - a paper, \preserved. Of electronic documents, information and carrier is detachable, electronic file information with the carrier to file information at any time separability face is modified, theft, and even the danger of being destroyed. In addition, the protection of electronic file information can not be neglected is also facing a stealth killer - computer viruses. Computer virus is a program that by modifying other programs, and to embed and implement their own copy of the infection to other programs. Therefore, how to protect the information from the protection of the damage is an important issue of electronic documents. Currently, the protection of electronic file information are not modified, theft, technical way to remove the main firewall, access control, data encryption, digital watermarking method, digital time stamp law. Among them, the data encryption method is determined by the encryption transform method for processing the data is not encrypted, making it difficult reading the data; digital watermarking method is to use a technical approach to the author's identification (such as the Indian sign, pattern etc.) hidden in electronic documents, electronic files if they are copied, these signs will not be copied. The electronic file information to ensure that the only attribute. Digital time stamp method is used to ensure the authenticity of electronic documents and the original information is not compromised,[link widoczny dla zalogowanych], if the archiving of electronic documents are modified, deleted, the file is generated when the time-line registration can not be changed. However, the information technology to protect electronic documents can only be relative, because the encryption and decryption of electronic document technologies are constantly evolving.
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