Entropy Library for Go

A lightweight Go library to calculate the Shannon entropy of strings. This library is useful for detecting randomness in strings, such as in security applications like anomaly detection, DNS analysis, and more.

Features

• Compute Shannon entropy for any string.
• Lightweight and easy to use.
• Includes unit tests for reliability.

Installation

Install the library using go mod init entropy:

Usage Import the library and calculate the entropy of a string:

package main

import ( "fmt" "github.com/chrisjchandler/entropy" )

func main() { input := "www.google.com" result := entropy.Calculate(input) fmt.Printf("Entropy of '%s' is: %.4f\n", input, result) }

Example Output For the input www.google.com

Entropy of 'www.google.com' is: 3.1808

API Reference func Calculate(input string) float64 Calculates the Shannon entropy of a given string.

Parameter: input - The string for which entropy will be calculated. Returns: float64 - The Shannon entropy value.

Testing Run the included tests using go test:

Contributing Contributions are welcome! Feel free to open an issue or submit a pull request.

Acknowledgments Inspired by the need for efficient entropy calculations in DNS and anomaly detection scenarios.