Security, Symmetric Encryption, Cryptography, Encryption.
//Substituting this back to 1 (y*9973 + y*27) mod 9973 = 27 (y*9973 mod 9973 + y*27 mod 9973)mod 9973 = 27 y*27mod9973 = 27 //So multiplying a number by 10000 is equivalent to multiplying it by 27 if we have to // module it by 9973 So effectively multiplying 4 digit numbers mod 9973 works as below