Book (Practical) Science and nature A Primer on Cryptography Starting in Junior High Mathematics : How Modern Cryptography Was Created

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Science and Nature
I want to know! Science, cryptography, and passwords are indispensable in our daily lives. They are combinations of alphabets, numbers, and symbols that protect us from various security threats. How does this work? In fact, we can make two digit cryptography using junior high school mathematics. This book begins with an explanation. Cryptography is made by making full use of prime numbers (numbers with no divisor other than 1 and itself), prime factorization, and the Euclidean algorithm. Further down, it develops into integer theory, elliptic curve theory, and so on. It incorporates many of the practical exercises (manual calculation, basic use, and so on) that the author conducted in high school classes. We will study the mechanism of cryptography. We will look back on how RSA cryptography, which is now the mainstream, was born. We will also look back on the historical background.