Cryptography is of great importance to people of all generations and is presented as an application of

mathematical sciences. On the other way, giving mathematics as basics of cryptography reduces the application

of mathematical insights to the message “Cryptography contains Mathematics”. This paper introduces

cryptography from Caesar Cipher to Public Key Cryptography with simple examples. Using the Fermat’s little

Theorem in RSA Cryptography specific mathematical competencies are highlighted that complement standard

teaching and deepen mathematical concepts. Prohibitions in cryptography will also be discussed in this paper.

**Author(s) Details**

**Dr. Kiran Bala,
**Department of Mathematics, Govt. P.G. College for Women, Sector 14, Panchkula, India.

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