We will try to encrypt “helloworld” here.įor this purpose we will need to convert this plain text into diagraphs. So the first thing we have to do in encrypting the data using hill cipher is to take up a string of characters as key matrix to encrypt data and convert this key matrix to number matrix.įor this context we will be using the string –“mble” (this is just any random combination of letters) and on converting this string to a number matrix following the rule of numbering alphabets from 0 to 25 (i.e. The same method can be applied to 3X3 matrix to get the desired results. In this example we are going to take up a 2X2 matrix for better understanding and simplification. Hill cipher uses the calculations of matrices used in Linear Algebra but it’s simple to understand if one has the basic knowledge of matrix multiplication, modulo calculation and inverse calculation of matrices. Basically Hill cipher is a cryptography algorithm to encrypt and decrypt data to ensure data security.

Until you don’t have a brief understanding of Hill cipher algorithm, their programs will merely a code to copy paste.Īs per Wikipedia, Hill cipher is a polygraphic substitution cipher based on linear algebra, invented by Lester S. To start with the program directly is not a good idea here. Here you will learn about hill cipher in java with program and algorithm.

Java source code encryption