Each user's computer (or other information call placement), on the basis of simple numbers will be generated encryption key, Cooperation obschaemy anyone, and the decryption key known only konkretno- mu user. Here's how it will look in practice. I have the information that I want to convey to you. My system (based on the information ment device or computer) finds your public key, and it still power encrypt a message before sending. No one, except you, the message not to be able to read, despite the fact that it has long become a key asset public. Why? Because you owned public key is not contained Though expressing information necessary for decryption. You get the message and computer decodes it on the basis of key personnel, appropriate public mu.
But you want to respond to a message. Your computer education finds schy key and with it encodes reply. None other than the message able to read, despite the fact that this key is really just common. And so at least one, I just know the contents of your note, because only I have a personal decryption key. Such a system is practical, since no one will have to exchange keys in advance.
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But it does not happen tomorrow. It is not only in technology. The book, the magazine or newspaper, issued on paper, there are still advantages estate Societies to their electronic versions. First, the digital paper not without prochitaesh information devices-the same personal computer. Second, the book is a compact, light, printed on good our paper is a clear script, in comparison with a computer is worth pennies. For at least in the next decade by "fat" on the exam paper computer wounds unlikely to be better than on paper. I am confident that the first doping will receive wide distribution of the digital documents that will dut not merely duplicate paper, and open up entirely new possibilities of. TV - if it compare with the same book-big thing (even cumbersome), expensive, and permit it is even worse than that of monitoring tions, but this is not reflected in its popularity. Television brought in our homes and videorazvlecheniya proved so attractive that took his place in our lives along with the books and magazines.
Gradually, the development of computers and monitors production technology will lead to the creation of almost weightless, a universal electronic books (or "e-book"). Imagine: in the box about the size and weight of mapping the current book (or flexible in hard cover) will be display, able to display text, pictures and video in the highest permission 's. You will be able to "load" the page ... finger or give commands to vote, and so you need to find passages. With such a device, you will any document is available on the network.
However, the true meaning of electronic documents is not that we able to read them on any apparatus. The transition from paper to books Electronic-only the final stage of the process, which now growing very rapidly. The most exciting of the other digital documents change the meaning of "document".
We will have to invest a sense not only of the term "document", but in the notions such as "author, publisher, office, school classroom" and "textbook." This will entail drastic consequences.