/Encryption-And-Decryption

Encryption and Decryption Java Program that is use to encrypt and decrypt message. If user enter correct ID and Password.

Primary LanguageJava

Encryption & Decryption System

Welcome to the Encryption & Decryption System! This system allows users to securely encrypt and decrypt messages using a predefined set of symbol mappings.

Features

  • User Authentication: Users must log in with a valid ID and password.
  • Message Encryption: Convert your plain text messages into an encrypted format.
  • Message Decryption: Convert encrypted messages back into plain text.
  • Simple Console Interface: Easy-to-use console interface for entering messages and viewing results.

Getting Started

Prerequisites

  • Java Development Kit (JDK) installed on your machine.
  • A terminal or command prompt to run the application.

Running the Application

  1. Clone the repository:

    git clone https://github.com/YourGitHubUsername/EncryptionDecryptionSystem.git

  2. Navigate to the project directory:

    cd EncryptionDecryptionSystem

  3. Compile the application:

    javac EncyptionDecryption.java

  4. Run the application:

    java EncyptionDecryption

Usage

  1. Welcome Screen:

    • The application starts with a welcome message.
    • Users are prompted to enter their ID.

  2. User Authentication:

    • Enter your ID and password to log in.
    • If the ID or password is incorrect, you will be prompted to try again.

  3. Main Menu:

    • After successful login, you will see the following options:
      1. Encrypt a message.
      2. Decrypt a message.
      3. Exit the program.

  4. Encrypting a Message:

    • Select option 1 from the main menu.
    • Enter the message you want to encrypt.
    • The encrypted message will be displayed.

  5. Decrypting a Message:

    • Select option 2 from the main menu.
    • Enter the message you want to decrypt.
    • The decrypted message will be displayed.

  6. Exiting the Program:

    • Select option 3 to exit the program.

Implementation Details

Classes

  • EncyptionDecryption: This class contains the main method and handles user authentication.
  • BackendWork: This class contains methods for encryption, decryption, and displaying options to the user.

Methods

  • wrongPass(int count): Checks the number of incorrect password attempts.
  • wrongID(int count): Checks the number of incorrect ID attempts.
  • displayOptions(): Displays the main menu and handles user choices.
  • getEncryptedValue(String toEncryptMessage): Encrypts the given message.
  • getDecryptedValue(String toDecryptMessage): Decrypts the given message.
  • getEncryptedCodes(char ch): Returns the encrypted symbol for a given character.
  • getDecryptedCodes(char ch): Returns the decrypted character for a given symbol.

Symbol Mapping

The system uses a predefined 2D array symbols for mapping characters to their encrypted symbols and vice versa. This array is used in both encryption and decryption processes.

Contributing

Contributions are welcome! Please fork the repository and create a pull request with your changes.

License

This project is licensed under the MIT License. See the LICENSE file for details.

Contact

For any questions or suggestions, please contact:

Thank you for using the Encryption & Decryption System!