Mathematics and computer knowledge and other knowledge needed for cryptography. (The more detailed the better, the better the answer is than the lack, and you will get extra points ~)

In the specialized courses of universities, cryptography generally refers to commercial and civil cryptography, which requires a certain number theory foundation and computer foundation; Cryptography originated from the early history of mathematics, and it is closely combined with number theory, the jewel in the crown of mathematics. The number theory knowledge that needs to be mastered skillfully includes congruence theory, unary congruence equation, square residue and unary quadratic congruence equation, primitive root and exponent.

In addition to the above number theory, cryptography must also master the basic knowledge of traditional cryptography, such as traditional cryptography, public key cryptography, Shannon theory of cryptography and so on.

Most importantly, contemporary cryptography is closely combined with computer science and technology, so we have a solid grasp of the concept of randomness, sequence cipher and shift register, network security encryption technology, encryption algorithm and other knowledge. The above information comes from the textbook "Fundamentals of Business Cryptography" of Wuhan University.