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The future of the Internet, especially in expanding the range of applications, involves a much deeper degree of privacy, and authentication. Without these the Internet cannot be properly used to replace existing applications such as in voting, finance, and so on. The future is thus towards data encryption which is the science of cryptographics , and provides a mechanism for two entities to communicate without any other entity being able to read their messages. In a secret communications system, Bob and Alice should be able to communicate securely, without Eve finding out the contents of their messages, or in keeping other details secure, such as their location, or the date that their messages are sent. The two main methods used are to either use a unique algorithm which both Bob and Alice know, and do not tell Eve, or they use a well-known algorithm, which Eve also knows, and use some special electronic key to uniquely define how the message is converted into Ciphertext, and back again. A particular problem in any type of encryption is the passing of the secret algorithm or the key in a secure way, as Bob or Alice does not know if Eve is listening to their communications. If Eve finds-out the algorithm or the key, neither Bob nor Alice is able to detect this. This chapter looks at some of the basic principles of encryption, including the usage of private-key and public-key methods. As we will find public and private key methods work together in perfect harmony, with, typically, private key methods providing in the actual core encryption, and public key methods providing ways to authenticate, and pass keys.
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This table shows the occurances of the letters in the text (ignoring the case of the letters):
This table shows how the text matches a normal probability to text (where 'E' has the highest level of occurance and 'Z' has the least). The grey rows show what would be expected for the order, and the red one shows what your text gives for the order: