{"id":11535,"date":"2023-01-03T06:42:17","date_gmt":"2023-01-03T06:42:17","guid":{"rendered":"https:\/\/www.prepbytes.com\/blog\/?p=11535"},"modified":"2023-05-22T07:45:11","modified_gmt":"2023-05-22T07:45:11","slug":"caesar-cipher-program-in-java","status":"publish","type":"post","link":"https:\/\/prepbytes.com\/blog\/caesar-cipher-program-in-java\/","title":{"rendered":"Caesar Cipher Program in Java"},"content":{"rendered":"

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In this article, we will dive into the fascinating world of encryption and guide you through the process of building your own Caesar Cipher program in Java. Whether you’re a beginner seeking an introduction to encryption or an experienced developer looking to enhance your Java programming skills, this article will provide you with a comprehensive foundation to understand and implement the Caesar Cipher.<\/p>\n

By the end of this article, you will have not only built your own Caesar Cipher program in Java but also gained a deeper understanding of encryption techniques and their practical applications. Armed with this knowledge, you will be well-prepared to tackle more complex encryption algorithms and contribute to the ever-evolving field of cybersecurity.<\/p>\n

What is Caesar Cipher?<\/h2>\n

Caesar Cypher is a fascinating problem that dates back to the time of Julius Caesar, when information was transmitted by changing the original message in a way similar to how the encryption-decryption phenomenon is used today, as off-topic as that may appear at first.<\/p>\n

If character B needs to be shifted by three positions, then B->C->D->E can define the transition nicely. Encryption is achieved by acquiring the shift input, n, then shifting each character in the string by n places.<\/p>\n

Decryption of character is the process of translating a character back to its unencrypted form, which is B. To qualify as a Caesar Cypher, this method of substitution is applied to each word’s character.<\/p>\n

The shift value and modulo can be added together to find values that are more than the unit value of the highest alphabet, z, which is 26 according to the two formulas below.<\/p>\n

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Dry Run of Caesar Cipher Program in Java<\/h3>\n

We can now see more clearly whether or not the Caesar cypher genuinely functions. Let’s walk through an example step by step to learn how it operates.<\/p>\n

Our task is to first encrypt and then decrypt the input word, ATLAS, returning it to its original form. We can accomplish this using the detailed technique shown and discussed below.<\/p>\n

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In the above illustration, A was moved by three places and placed as D in the result string.<\/p>\n

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The alteration made of T with change of +3 in 1st index will lead to storage of V in the string.<\/p>\n

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At index 2, L was replaced with O, that is stored in the 2nd index of result string.<\/p>\n

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Similar to the operation at the 0th index, here also, A is going to turn into D when shifted by 3 positions. Thus D is going to be stored in the resultant string.<\/p>\n

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The final operation on the last index to replace S in a similar fashion, leads to V getting stored in the result string.<\/p>\n

Algorithm of Caesar Cipher Program in Java<\/h3>\n

We talked about utilizing the shifting integer to replace character values on every character stored in the string in the previous section. Let’s now examine what would be a clear algorithm to reinforce our understanding of the Java Caesar cypher program.<\/p>\n

Algorithm:<\/strong><\/p>\n

    \n
  1. Take a shifting integer between the ranges of 1 and 25, and a string.<\/li>\n
  2. Make a fresh result string.<\/li>\n
  3. For every character in the string, iterate:\n
      \n
    • Depending on whether the character is being encrypted or decrypted, shift it by n places and store it as char type, newchar.<\/li>\n
    • Include newchar, the shifted character, in the result string.<\/li>\n<\/ul>\n<\/li>\n
    • Return the string or print it.<\/li>\n<\/ol>\n

      Code for Caesar Cipher Program In Java<\/h3>\n

      Let’s move on to the code element of this Java Caesar cypher program once we have a good knowledge of how each phase in the process plays out.<\/p>\n\t\t\t\t\t\t