Encrypt and Decrypt Text Easily with Cryptia

Preview:

Description:

Cryptia is a tiny text encryption and decryption JavaScript library that provides a simple solution for client-side text data protection.

It encrypts text data through character substitution, replacing each character in the input text with a corresponding encrypted character. This encryption method suits applications that need basic text security, such as:

• Form data protection before transmission
• Client-side message encryption
• Basic data obfuscation in JavaScript applications

How to use it:

1. Install Cryptia with NPM.

# NPM
$ npm install cryptia

2. Import and initialize Cryptia in your project:

<script type="module">
  import cryptia from "./cryptia.js";
  const crypt = cryptia();
</script>

3. Use the encrypt() method to encrypt text.

const encrypted = crypt.encrypt("welcome to cssscript.com");
// => vtsegdt zg elllekohzªegd
console.log(encrypted);

4. To decrypt the string, simply call the decrypt() method with the encrypted text:

// => welcome to cssscript.com
console.log(crypt.decrypt(encrypted))

How it works:

The encryption process works through two core algorithms:

The encryption algorithm defines the base character set, including letters, numbers, and special characters. The decryption algorithm contains a shuffled version of this character set, creating the substitution mapping.

During encryption, the library processes each character:

• Locates the character’s position in the base set
• Substitutes it with the corresponding character from the shuffled set
• Preserves unmapped characters in their original form

The decryption process reverses this operation by:

• Finding each character’s position in the shuffled set
• Replacing it with the corresponding character from the base set
• Maintaining any characters outside the defined sets