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    How group works in cryptography?


    hi,guys
    There are some questions that make me puzzled, since the time I come across cryptography is not very long. For example, in many books, it is told that group is an important primitives in cryptography, and we do see some examples, such as many definition about group. However, we are not presented the example that how group works in cryptography. Maybe it is my problem to find the example, but if someone can give me some presentation, I feel very appreciated.
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    I assume that by "group" you mean the algebraic structure?

    Here is a great example of how groups are used in cryptography.

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