https://github.com/mostafahima/caesar-cipher-program

This program uses Caesar Cipher to encrypt or decrypt text by shifting letters based on a user-defined number interactively.
https://github.com/mostafahima/caesar-cipher-program

caesar-cipher python

Last synced: 5 days ago
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This program uses Caesar Cipher to encrypt or decrypt text by shifting letters based on a user-defined number interactively.

• Host: GitHub
• URL: https://github.com/mostafahima/caesar-cipher-program
• Owner: MostafaHima
• Created: 2024-12-17T09:21:14.000Z (17 days ago)
• Default Branch: main
• Last Pushed: 2024-12-17T09:27:44.000Z (17 days ago)
• Last Synced: 2024-12-17T10:27:30.996Z (17 days ago)
• Topics: caesar-cipher, python
• Language: Python
• Homepage:
• Size: 4.88 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# Caesar Cipher Program

This program implements the **Caesar Cipher**, a simple encryption and decryption technique that shifts letters in the text by a given number of positions. The program allows users to encode or decode messages interactively.

## Features

- **Encryption**: Shift text letters to the right.

- **Decryption**: Shift text letters to the left.

- Handles only lowercase letters; other characters remain unchanged.

- Interactive user interface with options to encode, decode, or exit the program.

- Validates user input for shift values.

## Requirements

The program uses the following Python libraries:

- `pyfiglet`: To display ASCII art for the program title.

- `string`: To process the lowercase alphabet.

To install the `pyfiglet` library, run:

```bash

pip install pyfiglet

```

## How to Run the Program

1. Ensure Python is installed on your system.

2. Install required dependencies.

3. Run the script:

   ```bash

   python main.py

   ```

## Usage

- **Step 1**: Enter the text you want to encode or decode.

- **Step 2**: Enter the shift value (an integer).

- **Step 3**: Choose one of the following options:

   - `encode`: Encrypt the text.

   - `decode`: Decrypt the text.

   - `exit`: Exit the program.

### Example

**Input**:

```

Enter the text to process: hello

Enter shift value (integer only): 3

Would you like to Encode, Decode, or Exit? (Type encode/decode/exit): encode

```

**Output**:

```

Encrypted Text: khoor

```

**Decoding Example**:

```

Would you like to Encode, Decode, or Exit? (Type encode/decode/exit): decode

Decrypted Text: hello

```

## Notes

- Only lowercase letters are processed.

- Non-alphabetical characters remain unchanged.

- The program runs in a loop until you choose to exit.

## Program Flow

1. Displays ASCII art.

2. Prompts the user for input text and a shift value.

3. Encrypts or decrypts the text based on user choice.

4. Repeats the process until the user exits.