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People realized that information has value a long time ago - it’s not for nothing that correspondence Among the entire range of methods for protecting data from unwanted access, a special place There are two main encryption methods: symmetric and asymmetric. Symmetric encryption methodRice.The same key (kept secret) is used for both encryption and Figure 1 illustrates the use of symmetric encryption. The main disadvantage of symmetric encryption is that the secret key Asymmetric encryption methodRice.Asymmetric methods use two keys. Let's illustrate the use of asymmetric encryption. A significant disadvantage of asymmetric encryption methods is their low Figure 3 illustrates efficient encryption implemented by combining symmetric and asymmetric methods. Fig.3 Effective message encryptionFigure 4 shows the decryption of an effectively encrypted message. Fig.4 Decryption of an effectively encrypted messageA type of symmetric encryption has gained some popularity, The procedure for working with composite keys is a good example of following the principle Many cryptographic algorithms require as one of the parameters |
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