Needless to say, everyone's personal information is the basic carrier of human productive activities and social activities, bearing the signals, messages, intelligence, information, documents and other contents in the form of words, symbols, sounds, graphics, images, etc., which spread through various channels. Information is ubiquitous in nature, human society and people's thinking. The generation, dissemination and storage of information span time and geographical restrictions-the emergence of characters. The invention and application of computer technology, combined with modern communication technology, broke through the ability of human beings to process and utilize information by using brain and sensory organs, and completely changed the means of human beings to process information. Definition of information: narrow definition of information, which can be defined as a kind of information, intelligence, documents or data; The broad definition of information, which can be defined as the expression and statement of the existence mode, motion state and interrelated characteristics of various things, is the natural world, And the universal attribute of a kind of material and things that are ubiquitous in human thinking activities. Human society The basic elements and dissemination process of information: source: subject of information. It represents the source information with a certain existence mode, motion state and interrelated characteristics. Information source reflects the objective existence of transactions, so information source and information source have different connotations; Channel: A transmission channel established between a source and a sink. Sink: the receiver of information. Is the cognition and understanding of the information source;
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